Phoenix has a nice and very large airport with multiple terminals. You can find lots of amenities at the airport and some decent dining options. Fair warning though that there aren't that many dining options once you get to the gates so grab food or eat before you get there if you want any diversity. Multiple Starbucks through out the airport so it is easy to find your caffeine fix as needed. Security can take some time, like most airports at times, so get to the airport with plenty of time to spare for your flight.