I'm a frequent traveler as well, and I must say - the layout and ease of Phoenix Sky Harbor is far better than most airports I've been to. At first, driving through the terminals were kind of confusing to me but then you get used to it and find out that it's just a big loop. Anyway, I've never had a problem going through security which is a big plus for me. Other airports I've been to (*cough, LAX) could give a rat's ass if people are taking too long or holding up the security line.
The food and entertainment chocies are kind of meh, but all in all - FREE WiFi! If anything, that should be enough to give this place at least 3 stars. Nothing worse than getting stuck at the airport with nothing to do! Sure, I could read a book...but that's not as fun as watching a cool movie on your laptop or phone and have people trying to peek over your shoulder...