I've owned 2 of these memory sticks for several years and both still work perfectly.
I have each one attached to a set of keys so I can usually be sure that I have got one on me when i need it, but because of this they have take a bit of a battering with the keys rubbing against them for so long. The little silver covers for the hinges were the firsty things to go and the one is now a bit chipped around the cover from being repeatably dropped and thrown around.
I accidently once dropped the one 2 stories onto a tiled floor and after collecting the bits and puching it all back together it still worked and acted like it never happened.
The memory itself is pretty quick in a usb2 slot and feels a fair bit faster than a portable hard disk when writing files to it.
Not much more to say really, but my experience with these memory sticks leads me to say that I would certainly buy another imation product in the future.