No problems here for me. I have flown into Phoenix Airport twice and have been on time for both flights. Most recently I was extremely happy with Sky Harbor as I was super late for my flight. It did take forever to find the place to get gas and then drop off my car - it was absolutely confusing and as i was rushing to the bus, I found out each bus goes to different terminals. That sucked. I had to wait for my Terminal 1 bus to get there as I was nervously checking my watch thinking when the next flight was because the security line would be absolutely ridiculous. I get on the bus and the driver says I have "plenty of time". This was 30 minutes before my flight is supposed to depart. I go to security and I'm shocked - I am one of 2 people in the line. It takes me all of 2 minutes to get through and I have casual yet flustered conversation with the guard and realized I only had 25 minutes before my flight left. I was able to get some food and make it to my flight as they were boarding Zone 3. Sucks I had to check my bag but who cares I was so happy I made my flight. This was certainly a first and I feel like Phoenix treated me well even though I was a bit lucky.
Just remember to give yourself extra time to return your car if you rented one! I"ll give it 4 stars just because they got me through security so quickly.