Fry's grocery store consistently has the best prices on groceries. Their staples like milk, meat, juice and produce are almost always cheaper than any other store in the area, even when they are not on sale. When they do put stuff on sale, it's usually a very good deal.
The selection is pretty good, the bakery is excellent, and some of the stores have a kids corner where kids can play while parents shop. They also double (sometimes triple) coupons, so combined with their great sales you can save a ton of money.