I wrote a review earlier but I didn't really use the case before writing it. So this is my revised review.
The case fits great in the hand, and it doesn't mess up the dimensions of the phone at all so if thats something you're worried about its not a problem. It also allows you to use a screen protector without a problem, and it keeps the camera protected! The buttons over the actual buttons feel much better than the actual buttons from the phone. The holes for the speakers and mic don't cause any issues. The headphone port is very wide, I haven't come across anything that can't fit in the port. The clear back is a very nice thing to have because very few people know that a nexus phone even exists, so when people ask what phone I have I'm happy to show them that its a nexus! Also, the color contrast of a black N5 and a bright red case is amazing.
My only complaint which is very small and isn't a big issue but I just want to mention it. The corners at the bottom left and right of the USB port are a bit sharp, and when you hold it a certain way it can bother your finger over some time. Again, its not a big issue at all.