This screwdriver worked perfectly in taking apart a couple of 360 controllers I had lying around that I needed to clean. The tip is magnetized so it helps to pick up screws in the longer channels on the controller. Make sure you keep track of them, though; they are so small that it's easy to lose them before you put back the controller. Also pay attention to how everything fits; it's easy to put something backwards and then realize it's not going to work when you're close to putting the controller together.
So far it has been holding up okay, although I've only used it to break down and reassemble 4 controllers so far, so I'll try to keep this updated as time goes on.
As other reviewers have stated, be careful of where you order from; there are quite a few sellers giving out different tools.