This joystick is perfect for the x-box controller. They fit just like the originals but be warned opening the newer 360 controllers is very complicated the screws are unique and cannot be opened without a star head driver. This is the only problem you will face with this product.
My XBox360 controllers suffer from severe wear and tear (perhaps after countless hours of FIFA and etc), and the part which bears the most brunt must be the analog joysticks - half the rubber came off for one of them!
Some richer folks may be able to replace the entire controller ($64 a pop) but I believe in spending only when necessary. So when I saw this item on the website it was like a godsend! They should sell this at all electronics outlets - the conniving merchants/retailers must want us to spend $ buying more controllers!
Had a fun time watching videos on Youtube figuring out how to dismantle the controller in the process of replacing the analogs - some folks may find it tiresome but it is a good learning experience nonetheless :) And no doubt you save on the extra $!