I wasn't going to review this store but I have to comment on the customer service I encountered this past weekend.
I was in Las Vegas for an early Thanksgiving and I decided to get the new iPhone 5. I opted for a corporate store because I've experienced enough instances of sales associates not knowing AT&T policies and procedures at other mobile device retailers. I asked whether they had a 64 GB version - which they did so I walked in 20 minutes after my call.
Roberto made my stay in the store brief and painless. He activated the service on my new phone and offered other services (gratis) which I declined but it was nice that he offered. He knew his merchandise and he made sure I left without any questions, included those he figured I would have after the fact. Knowledgeable but humble associates like him always make me want to be loyal and return to that store, for that person.
Like I said - I came in - was taken care of and I left - a boy with his new toy!