Ah..Yogurtology. How I miss thee. Although it's been over 3 months since I've left Arizona, I still miss Yogurtology like a puppy misses its bone. It's got the best tart froyo hands-down, and is cheaper (and tastier!) than nearby MoJo.
The toppings bar is diverse; the fresh fruit is always fresh (instead of on-the-way to rotting like some other places I've been), and they have lots of toppings (Nutella, anyone?)
The store is always clean, and the employees friendly. I've actually considered getting a membership to nearby LA Fitness just so I can use Yogurtology as a motivator to visit the gym. If only they would open up a store on the East Coast.