Rating: 
Summary: Proper fit was impossible for me
Review: Had hoped for more with these. They worked fine and sounded very nice but there is very little in the way of adjustments. Just the extension of each ear piece. But the angle and curvature could not be adjusted so they always seemed off kilter. Spoiloed by my Grado's maybe?
Rating: 
Summary: UNBELIEVABLE!
Review: I am in awe. I suffer from moderate hearing loss and tinnitus. When I put on the headphones I could not believe it. The sound is magnificent. If a pin drops on the show you are watching, you will hear it! When I first listened, I thought someone was in my home with me because difference sounds seem to come from all over! The headphones are light-weight, comfortable to wear; they sit on a charger which plugs into the wall and into the audio out on the back of the tv. I thought the Plasma was great sound; these headphones allow me to hear sounds and words I never could before! BUY THEM. No sense in paying any more for headphones. I don't know how these can be topped.
Rating: 
Summary: Almost useless
Review: I bought these because I have Sennheiser HD212 headphones which I found to be great.
Unfortunately the quality of these wireless phones is great only if you are in a very close proximity to the base. Additional noises, clicks etc. start to appear only 10 feet away, 25 feet away the quality is really bad (no walls or anything else in between, maximum volume fed into the base for higher signal level). Also the headphones do not feel comfortable on your head. I live in a area in a city with 4-5 story tall old appartment buildings around. Changing the channels does not help. While tuning the headphones you can also get to a phone conversations and other communications.
Rating:
Summary: once you go wireless, you won't go back
Review: I have had these headphones for about a month or so now and I have been 100% impressed. These headphones sound increadable no matter where you are in your home. You can go quite a distance and still hear every note.
Rating:
Summary: Extremely disappointed
Review: I lived in Europe in 2003 and purchased a pair of Sennheiser wireless headphones there that I really liked--they were a little more expensive than this pair, but worked great. Unfortunately, they worked on 220V, and I didn't really have room anyhow, so sold them when I moved back to the US in 2004. I bought these as a replacement, but they were NO replacement!Here's the problems I encountered: (a) No RCA->mini plug adapter is included, as another reviewer states. Funnily enough, the box DOES say it is included! Who has RCA jacks for headphones? If anything the default should be a mini-plug, with an included adapter to RCAs. (Scratching head...) (b) Interference. Always present. Even from 10 feet away. Moving around helps, but you end up having to hold your head in the "perfect" position.... not feasible. My old pair worked great, didn't have this stupid manual tuning knob these do, and had almost no interference (until I got a significant distance away). (c) Standard NiMH batteries are included, BUT with a caveat. This is a good thing in general, because my old set came with 2 batteries, but they were 'custom' and probably not ideal in that regard (but you could charge 1 set while listening; you can't do that with these!). The caveat is, they included the absolute cheapest nimh battieries they could find, GP 600mAHs. If you DO buy this, make sure to replace those with some 1500mAH+ ones (that should only cost a few bucks). (d) The on-hook charging is picky. If you adjust the headphones to make them larger (pulling down the ear parts), sometimes it won't charge when it goes back on the hook. How silly is that?? It shouldn't be finicky. The older ones I had also had problems with engaging the charge mechanism when put on-hook, and it was an ENTIRELY different design. So, this is the SECOND design Sennheiser has screwed up. (If you don't adjust the size, it works fine though. So you'd better have a small head.) (e) Probably the worst thing: Auto-shutoff. Hey! A great feature right? The base station shuts itself off if it doesn't sense audio for a while... for example, if you pause a DVD or TV, to go to the bathroom, or whatever. When you come back, you'll notice the base station has autoshutoff, but the headphones haven't, so they will be squealing SUPER LOUDLY since there is no signal coming from the transmitter. Brilliant! I bet if you fall asleep during a DVD without music on the menu, it would return to the menu, transmitter shuts off, and I wouldn't be surprised if you could get hearing damage from this "feature". I'd give it 0 stars if I could. I won't be buying another Sennheiser product (I owned the previous wireless pair, I own a noise-canceling pair that I'm pretty happy with, and I have a 80s-era wired pair in storage somewhere). None of them have been perfectly designed, but the others at least had good sound quality to make up for it. This product failed on every account, and convinced me that their designs just aren't worth "putting up with" for the sound quality. I'll seek out another manufacturer.
Rating:
Summary: Excellent buy!
Review: I'm going to keep it nice and simple. I bought this headphone a week ago here on Amazon and LOVE it! It has exceeded my expectations.
1. it's very light and the ear pods are very comfortable. the headphones are well balanced once worn.
2. the battery life is great! I charged it the full 24 hours initially and am now going to use it until it completely drains. Three of these cycles should ensure the best battery performance as memory effect will be reduced in subsequent chargings.
3. the range so far has been great. I can use it all over my house without any deadspots. I've even gone to the end of the driveway without any problems....soon I'll try farther out to see what she/he can do!
4. I have not had any of the interference issues some have had, but it can be easily corrected with a frequency adjustment
5. All in all, I think this is one of the best items I've ever bought on Amazon and I find myself using it all the time.
Rating: 
Summary: Great Sound, Great Price
Review: I've only had this headset for about a week, but I've been able to listen to it quite a bit, and so far, I like what I hear. It took only five minutes to set up, and when I first turned it on, I was amazed how clear the sound was, especially for wireless. I was able to hear quieter parts of my favorite songs, which on my computer speakers I was never able to hear. The only bad part about this headset is that you can't go too far from the receiver without hearing loud clicks and static. I went outside no more than 150 feet from the receiver and I could barely even hear the music over the static. Overall, I'd say buy this headset if you are planning on staying within 50 feet or so of the music source the majority of the time you would use the headset. When you are close to the receiver, the sound quality is great, especially when you look at how cheap this headset is compared to other similar headsets.
Rating:
Summary: Great Headphones!
Review: My wife and daughter have been after me to buy some wireless headphones for quite awhile because I generally stay up later than then and they are tired of hearing the TV at night. I did some research and checked out all of my options..these seemed to be the best value for the money....Sennheiser well known for wired and wireless headphones....Well, I am QUITE happy with my purchase...it did take me a little bit to figure the tuning...to get it just right, but the sound is clear, the base is great and I can turn the volume on the TV all the way down and still listen...Highly recommend these!
Rating:
Summary: Awsome Product
Review: The Sennheiser RS-120 headphones far exceeded my expectations; I could not believe how crisp the sound was for this wireless set and you just cannot beat the price for this type of quality. These headphones have great (perfect to me ears) sound throughout my house/garage with absolutely no noise interference. Have previously purchased 'more expensive' Sony Wireless set and I was very disappointed with quality of headphones and the amount of noise interference. I also liked the design of the headphone base/recharger; sturdy yet small enough to be inconspicous.
Rating: 
Summary: doesn't work at all
Review: These are decent enough headphones. They sound good although I detect a slight hiss. I didn't find them uncomfortable at all although they can slip off when I tilt my head too far forward. However, I can't use them at work at all. There is a constant rhythmic clicking even when no audio signal is present. I have tried to track down the source of interference but to no avail. It is not my computer, monitor or telephone as I have tried powering all these down. I tried tuning on all three channels. The online FAQ is of no help. As work is where I intended to use them, they are useless to me. Bottom line: they work acceptably well some places but not everywhere. Be forewarned that they may not work at all where you need them. The Sony headphones, also 900 mHz, do not have this problem although the reception is not as good.
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