Rating: 
Summary: Version 4 - Buggy
Review: Finally I had found out some information with this buggy version 4. So I was not alone! I had the same problem mentioned by Jon and An Electronic Fan, but not as serious in that it did not happen every time. (see 1 below)1. Dropped connection when rebooting or waking-up.
2. I was trying to disable the SSID broadcast, which was recommended by the manual for security reason. It took me a whole day to realize that it was impossible with this router (version 4, latest firmware 1.44.2). The same problem happened in earlier hardware and firmware versions before (saw some online discussion), and it came back again in this latest version.
3. Channel number for the linksys wireless card (also version 4) was not configurable, if it was different from the default channel 6.
4. Version 4 is sold together with version 3.x with the exact same bar code, which is quite confusing. No explanation was provided either in the package or on their web site. Since I was very happy using Linksys's WIRED 4-port router before, I was willing to spend more bucks to buy a wireless router from linksys again, which turned out not to be as good. I was really disappointed. Was it always like that when a good small company was bought by a large corporation like Cisco?
Rating: 
Summary: A defective product released into the market
Review: As other people already mentioned, avoid this wireless router with the version number 4. (the one with the picture of only one row of leds on the packaging) I've been a devout user of Linksys, but this time it's very disappointing. The problem is that this router often loses some packets. The download windows often hang and ftp connections are very unstable. Messenger loses connections as well. I don't know how Linksys came to release this kind of product into the market but it makes me sad to watch this product destroying Linksys's brand value. I hope the problems can be settled sooner or later. I'm going to return my router to the local retailer.
Rating: 
Summary: Stay Away from BEFW11S4 Version 4
Review: This router was configured quite easily, but is unable to keep either aim or msn messanger online for more than a couple of mins, also downloads freeze almost always. I would wait until linksys can get the version 4 firmware updated before considering purchasing this item.
Rating:
Summary: Serious problems with Version 4
Review: I have tried two of these routers and both have had a serious problem with the router hanging everytime a computer on the network is restarted or wakes from sleep. The online support pages and the trouble shooting in the printed materials that come with the router are pretty much useless. AVOID THIS PRODUCT AT ALL COSTS!!!
Rating:
Summary: Not a good router
Review: I bought the BEWF11S4 Version 4 a week ago and initially it appeared to work fine. After having it on for a couple of day I noticed that Instant Messenger and IRC would randomly disconnect on the two computer I had connected to the router. These computers were connected to the wired ports, and NOT wireless. I was not using any wireless devices at this point. I thought this was a problem with my cable modem, but when taking the router out and installing an older router (D-Link DI-704) the problem went away. After doing a little investigating it seems this router ignores some pings (pings from the LAN side work) and therefore causes connection timeouts. STAY AWAY FROM THIS ONE.
Rating: 
Summary: Easy Wireless Network.....
Review: I order this router along with a WET11 and WUSB. I have 2 computers and an Xbox and DSL. Thing is all of the computers and the Xbox are in different rooms. This was the best choice. I set it up and it worked great. The only problem I had was with the WUSB adapter and that was solved by a call to tech support. We spent some time on it and finally resolved the issue. (He didn't speak english very well so I could barely understand him) any way. If you are looking for a way to share your DSL line with an Xbox or extra computer this is a great affordable choice. And YES it does work with Xbox live.
Rating:
Summary: Don't expect it to last
Review: I recommended this unit for 6 months until it stopped working. Horrible customer service included a return to Linksys who sent it back saying that it checks out fine. I now use the equivalent unit from Netgear. I have seen enough reports of a similar experience by other Linksys users to think that this is a pattern. It seems to be some sort of irreparable failure in the firmware, hard as that is to fathom.
Rating:
Summary: Several serious problems, but good enough when it works
Review: First, a note: when I ordered my BEFW11S4, the page showed a picture of a thick device with three rows of connection LEDs. What I received was the BEFW11S4, vers. 4, which is thinner and only has one row of LEDs. I was a little confused, but I think it is the same product internally. My purpose was to provide wireless Internet access for my Mac (using an Airport card), and to hook up a network mp3 player. The mp3 player is a SLIMP3 (slimp3.com) that sits on the stereo and connects by ethernet to a Linksys WET11 Wireless Ethernet Bridge. (The SLIMP3 is about the coolest thing I've ever owned, but that's a whole other review.) I had no problems with the WET11 connecting wirelessly to the router. The web-based configuration interface worked well (much better than the WET11's). However, most of the "Advanced" configuration options are completely undocumented. My worst problem was that WEP encryption/authentication would not work properly with my Mac. When it was enabled, the connection would be maintained for a few seconds and then drop out. After dropping out, the router would be completely out of commission...I couldn't even connect to it through the ethernet ports. The only way I found to get the connection back was to cycle power on the router (pressing the reset button didn't work). I'm not sure if the problem is with the WEP implementation on my computer or in the router, but I know that I shouldn't have to cycle power on the router... The router also gets knocked out when my computer disconnects, so every time I boot up my computer or wake it from sleep, I have to walk over and cycle power on the router (sometimes several times). I've installed a switch at the power outlet so I don't wear out the connector. I can't imagine the headaches this would cause if I had several Macs connected. I'm hoping a future firmware version will clear up these issues. When I called tech support, I was on hold for about 20 minutes before anyone picked up. The woman who answered was very curt and didn't seem to know much. I would ask a question and she would put me on hold for about 5 minutes, I guess while she went and had a snack or something. It was frustrating enough that I decided to just hang up and live with the problems. I only bought this item because I was going to use it with a Linksys WET11 bridge. Otherwise I would have looked at some other WAPs.
Rating:
Summary: These routers do not work
Review: I bought two of these routers brand new, and a family member bought one as well. ALL 3 of them are defective. If a computer on the network reboots, the routers compeltely shut down. Also many services, like email, would not work through the router. It makes little sense. But these routers are junk, they simply won't work, and I reccomend everyone AVOID THEM AT ALL COSTS. You might as well go buy a brick, it will work just as well on your network. (NOT AT ALL!)
Rating:
Summary: Flawless victory
Review: Combining wireless and a 4 port switch - this product is best of its class. Setup is extremely simple - but the unit still manages to be feature rich. Even if you are not interested in sharing your DSL/Cable connection to multiple computers - this guy is still a must have. Your PC will basically be protected (in a firewall-esque way) due to the NATing. If you have some goofy PPPoE or other ... client that has to be installed on your PC - using the Linksys is a great way to free yourself from that as well. The router will authenticate you and handle the "dail-up" peice.
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