Rating: 
Summary: Canon A70 saves pictures in a snap
Review: The 40X professional card is much faster than a standard 4X card when recording high-quality images. The last reviewer said it didn't improve the speed 40 times, well it's not supposed to be 40 times faster, rather 40 X 150KB/s = 6MB/s. Worth the premium price if you are taking high resolution images with large file sizes. Otherwise you can save the money. Oh, and don't forget to buy a USB 2.0 card reader so you can take advantage of the improved download speed too.
Rating:
Summary: Extremely fast
Review: The 40X write speed on this card makes a huge difference when you want to spend less time waiting patiently for it to write.
As with any accessory, make sure your camera will get the full use of it before you purchase it; also, keep in mind that the WA (write acceleration) technology does not work with most older (and many newer) digital devices.
Rating:
Summary: Read your camera owners manual before purchasing.
Review: Your camera may not support the higher speeds. I own a Nikon 4300 and the owner's manual lists the approved memory cards that includes the Lexar 10x USB series. I bought a Lexar 12x 128MB CF that works wonderfully with the Nikon and the Imation FlashGo! media reader. I don't know if the read speed is topping off at 10x, but it's surely faster than 4x.Since the ratings box is a required field in order for me to submit this review, I provide a rating based upon the Lexar 12x 128MB USB CompactFlash.
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