The 360 controller is fine, works fine for every game I've tried it on . Some games you're still better off using mouse and keyboard though.
So long as you don't need to use the D-pad
For such an amazingly well-designed and comfortable controller, I can't believe how bad they made the d-pad.
Fortunately I hear the XBone's controller has fixed this. So the only reason to get the old 360 controller is that it's much cheaper. The XBone's controller is now PC compatible since they released official drivers for it.