I live in Tucson and come up to Sky Harbor often to fly.
PROS:
1. There are lots of non stop flights and since it is such a big airport, I can usually get some pretty good deals on them.
2. Security is fast and easy compared to most other big airports. The staff is pretty friendly too.
3. There are many parking options around this airport.
4. There are good food options in terminal 4 where I spend a majority of my time. I really can't speak for the other terminals.
5. They have multiple cell phone lots and the traffic flow through the airport in dropping off and picking up seems to be pretty good.
6. The baggage claim is phenomenal here. They get your bags out to you super quick!
CONS:
1. Right now there are separate terminals and if you change planes here you may have to go out of security and through again to get to another terminal. They are working on this with the sky train. But to be fair, I was once here when a crazy guy came after shooting someone in the face off site with his gun. When stupid people do stuff like that, you can isolate them better and only shut down one terminal instead of them all. That helps keep the flow going! haha! So maybe it is a small pro after all?!