Sky Harbor is leaps and bounds above Tucson Intl, well worth the drive.
Sky Harbor has so many more flights departing than Tucson and at a lower cost. Access to and from the airport is very well designed, easy access to valleys freeways. Many different parking options, a few of the nearby hotels let you park overnight (cheaper than the airport).
Free WiFi!
The only drawback is some of terminals have limited options as far as food goes. US Airways/United terminal looks to be recently updated and has more food options than the others.