I have flown out of and into Phoenix-Mesa Gateway several times, and I have never had a problem here. I have flown with Allegiant, and I have always had a very efficient time getting through security, even when there is a mass of people. This airport is very small, with only a couple of "typical" airport food choices, and a couple of small stores, but I don't mind that stuff at all. What I like about it is that it is easy to find a quiet place with a power outlet to hang out and wait for your flight. I also like that the parking in the economy lot is fairly inexpensive, and both times I have parked long-term I have come back to find my car in exactly the same shape I left it in. The shuttle is also very efficient, I have never had to wait more than 7-8 minutes to catch one to the economy lot and it is very easy to get in/out of the lot. (Just remember where you parked...)