Sky Harbor is as big as the Sky. There is nothing convenient about this airport, and if I actually have to go to Phoenix, I would rather drive there then have to fly there.
The gates are also far apart (read: just McCarran, because desert begs to be used). There are no rental cars anywhere close, which is amazing, because the airport is located in the middle of the city. The Enterprise rental car location is at least three miles away, which alone tells you how ill conceived this airport is.
Last time I was there, the airport was on fire. Or maybe it was a few times back. And to add to the misery, I was usually flying American West through here.