We purchased a few frames from this store and ordered some prescription glasses. They helped my dad out with a new set of lenses after the prescription was too strong on a pair he ordered from another store.
The computers were super slow the first time we went because the normal system was down and they were using a crappy alternative internet source (AT&T, of course). It made the whole process a lot more time-consuming. Not their fault, but definitely a negative.
The staffers were very friendly, and took the time to explain everything extensively (not to be said for every Lenscrafters store). We also got some great discounts on Ray-Bans.
It's a fairly small Lenscrafters located in the Paradise Valley Mall near the JcPenny. Between the screaming children on the toy train to the hoard of shoppers elbowing through the mall, it can be stressful getting to the store. There is another store across the street next to REI that may be easier to access.