I always park at Blue Sky whenever I'm going out of town for a few days. Anything longer than a week and it's cheaper to Uber from my place in the east valley. I've had consistently great service from the attendants and the shuttle drivers; I'm not sure how anyone can be that friendly and chipper at 4 am, but somehow they manage to pull it off. You can count on being at the airport within 10 minutes of pulling your car through their gates. On the last return trip, I walked out of Terminal 4 just as a Blue Sky shuttle was pulling away, but another one pulled up about 5 minutes later. It would probably take just as long (and way more expensive) to trek through the airport and take the skytrain to airport parking. I didn't get a free cookie or a free car wash on this last trip, but I also used a Groupon to get 2 days off my 5 day trip, so I can't really complain. Maybe next time!