I have been visiting Phoenix for the last week and living in Washington (land of granola and rain) I have a favorite froyo place and have been to many different places.
To me Mojo seemed pretty cool with the serve yourself that many places now have. They have a wide variety of fruit, candy, nuts, and granola to put on top as well as many choice of yogurt. The place was nicely decorate, fun, young and inviting. Seemed like a pretty nice place, plus there is the Yelp check-in deal BOGO.
After sampling a few different types of yogurt I settled on original the first visit and original/pomm swirl the next. Both time the yogurt starts out tasting really nice but by the 5th bite it gets really really sweet. It's not the toppings I put on I put pretty much the same stuff every time.
Overall nice experience, great options, but not so feat taste.