I don't get to the west side that much but when I do, Rita's is on my list! The staff was friendly and the place was packed from 6 pm on with families and teenagers.
I ordered a sundae. I know sounds lame compared to getting a Mistor or Gelati. But vanilla custard with Reese's peanut butter cups and hot fudge topped with whipped cream and a cherry, is awesome.
The price is affordable for what you get and I would recommend trying Rita's out. There is a location in Tempe as well.