I'm returning mine
I just received my SanDisk Cruzer Micro with U3 today, and it's going right back where it came from. If you don't use THEIR software's eject, you get an error message the next time you insert the USB key. This wouldn't be a problem, except that their software is sensitive to certain settings that I have, and _disappears_ from my screen before I can click on the Eject button. Hardware should not be settings-dependent. Also, if the USB connector is retractable, there should be a flap to prevent dust from gathering inside.