These analog sticks make games that require it a lot easier to play, because the short stubby thing that comes with the PSP just isnt good enough. My only problem is that it might not fit with your PSP case, i know, because i have a logitech case, and it doesnt close all the way. But the analog stick is worth it.
These have caused me to have to replace the analog mechanism inside my PSP twice until I wised up -- there is something about using them, if you are the kind of player who presses kinda heavy on his sticks, (I do it unintentionally) you WILL screw the internal mechanism up and need to either replace the internal mechanism yourself or send it in somewhere for service..
I don't really like the analog "nub" on the PSP and avoid games that make me use it. These little replacement snap-on joystick covers mitigate that flaw -- they're easy to grab, stick up, and increase the "throw" of the joystick.Unfortunately, they also stick way up into the air, making it impossible to use a normal PSP carrying case such as the wonderful Logitech PlayGear Pocket case, or even the propylene sleeve that comes with the unit.As much as I want to like these things, they're just too impractical ..