It provides excellent screen protection and is easy to install and remove. All the button and usb port are all accessible with it on.
Only problem I have with it is it can get in the way. Example would be if you have a stand for your PSP. because it wraps around the front of the PSP it creates a lip along the bottom and top of the PSP so the psp won't sit flush in the stand, you would have to remove the screen protector to use the stand.
But if you don't have a stand this is a great protector. Easier to install than the sticker based screen protectors