positive: + Very fast Very cheap for 4GB + + U3 with this (works for me perfectly !! (WinXP), but as I do not need it, I've just uninstalled, you want to it completely erase the stick simply download SanDisk to a software and run it. Uninstalling is very easy and takes only a few seconds, not minutes like someone writes here !!) + Small metal ring around him somewhere dranzuklippen (keyring etc.) + "USB connector" is pushed in or out, so it can be lost no cover