Well to quote my current oral surgeon "Southwest Dental Group is a corporation and their overall goal is to make money."
As someone stated earlier, they have "after work" hours, and lots of dental hygienists to fit you in quickly. (and with the exception of one dentist, I will admit, everyone has been friendly) I actually think they have a couple of specialists there who are pretty good at what they do. But that's where the positives end. In the time I went to the Tempe and Ahwatukee offices they have screwed up appointments, recommended thousands of dollars worth of work (that I didn't need done) and have essentially cost me time and aggravation due to negligence and poor communication. Even their own dental hygienists diss the place. They are behind the times in medical equipment and have a huge staff turnover.
If you don't have insurance, they will recommend every procedure possible. I had a dentist at the Ahwatukee office tell me I had a cavity and needed 3 inlays/onlays on my teeth. Since then I have had 2 other dentists tell me that was a complete lie. With so many dentists to choose from in the Valley, I would avoid these people like the plague.