Apart from the constant upselling, we had a great experience at this AT&T.
I took my grandparents here to set them up with iPhones (yay iPhone fam). As soon as we walked in, we were immediately greeted by Tony and he shook all of our hands. I love the customer service that they trained their staff with.
After looking around for a little while, they were ready to take the plunge. We went to grab Tony so that he could discuss service plans and such. My grandma decided that she wanted the black iPhone 4, which they did not have in stock. He looked it up and an AT&T, about a 15 minute drive away had it in stock. Then he offered to drive there instead so that we would not have to waste gas. Wow! We took him up on the offer and purchased the iPhones when he came back.
Fyi, their private lot is very crowded but there a few spaces directly in front of AT&T reserved for customers.