2007 MacBook (original) fan was getting noisy and I was afraid of fan failure
The repair went GREAT! Instructions were easy to follow, and though I was a bit nervous about opening my laptop I even got it all back together without any screws still in hand.
The new fan fan works flawlessly and my MacBook is humming along quietly now.
From each step of the instructions I put the set of screws in a small paper cup, so as not to mix up the screws and how they should be put back. It worked out well for me.