We have been spending our summer and Winter vacations in the Phoenix area for the last few years.
The boys, my wife and I really like it, of course the 115F summer requires a pool in the back yard. We rent a home for 10 days and it is reasonable to fly there, rent and having a rental car.
Phoenix and AZ does not seem to be a summer destination and therefore is affordable for summer vacation.
For the future (within the next 10 years) we were thinking moving there permanent to escape the 7 month of winter here in Minnesota. Further on AZ is in the center of everything, California beaches are not too far away, you can go to Utah skiing, New Mexico is a nice place to travel, etc........sounds like a good place to live.
Downside is that I do not know if there are many places for me to work as a mechanical engineer, I might be too specialized. My wife is a teacher and AZ school districts pay teachers 1/2 of what she makes in Minnesota. So we need to think about a career change, maybe even start our own business.