Summary: I selected this one because of the waterproof and shock-resistance. I'm wearing it on a necklace and it contains my and my wife's medical files in case of an emergency. EMT's, nurses and doctors can plug in into any device with a USB and obtain information that they need if I'm unable to provide it. My only complaint is that the cap will not stay on it, it keeps dropping off.
Summary: Using USB 3 make a huge difference. This drive does provide "Up to 50MB/s Write Speed and up to 100MB/s Read Speed" as advertised when using USB 3. Using USB 2 it performs like any other USB Flash Drive, but that is to be expected.
Summary: Had this for a while now. I've had no issues with it at all. Last night I left it in a pair of shorts and it went through the washer and dryer. Checked it this morning and still works perfectly.
Summary: I searched everywhere for a USB drive that will stay on a full size keychain for more then a week, and, for the most part, this does the trick. I've come close to loosing the cap a few times because the rubberized surface likes to bunch up the inside of my pocket. That being said, it's fast, high capacity, and a good price. What I really don't want to deal with is worrying about loosing the cap, but that's just a caveat of the form factor.
Summary: I did notice a speed increase when loading pictures and videos which is why I ordered it. I haven't got a chance to really measure the speed, but it was worth the low price. The only thing I don't like is the cap storage design, which is what other people said about it as well, other than that it's great.
Summary: Bought it as a memory device for a PVR. It does a fine job of recording and playing back 1080p content. Is not capable of doing time shifting. There is a slight hesitation every 20 seconds or so as the read request must wait for the block write to complete.