The display for my MacBook Air 2011 was cracked from the top of the case, meaning some of the display was fine, while the remainder was lots of groovy colors.
The repair was awesome. The parts I ordered from iFixit were exactly what I needed and suggested in the guide. The display was brand new. The guide was very easy to follow. I took apart the display and attached the new display, screwed everything back up and connected all the ribbons (no extra parts)!!
My suggestion is to take your time! Lots of small ribbon connectors can easily be manhandled if you use too much force. Also, make sure you tuck in the antennae wire properly before you screw the back of the laptop back on at the end. I started screwing the long screw and it wasn't going all the way in.
When I opened up the back to see what the problem was, I realized that the screw was digging into the antennae wire. I had broken the insulation on the wire slightly, but fortunately it didn't go all the way through. I hope it doesn't affect any wifi capabilities—so far so good—but just a heads-up that this cable needs to be tucked in!