I frequent this particular store because of its convenient location. It's across the street from UNLV, so you know they are used to students that need a place to grab a drink and chill/study. The staff has gone through a few changes, but they all remain friendly and helpful.
My only gripe is that the drive thru is slow. And it's always slow. When I stop by, it's pretty early in the morning, around 7am. I think they are staffed minimally (I think only 2 people) so there is a little bit of a wait, even if I am the only person in line.
Now if only they accepted my Starbucks card payments off my iphone through the drive thru, then I'll be set!