This might be my favorite coffeeshop in Las Vegas. Sadly, rather far from where I live so I can't go there frequently, but if I could, I would probably be there almost every day.
The latte I had was probably the best that I've had in Vegas. The seats are solid (literally--they're wood) and the tables, while not particularly large, are stable. There are some outlets around and they seem to maintain a setting that one can study in--I easily drowned out the music they were playing with my headphones. There's also some outdoor seating that looks nice.
The staff was also friendly, not pretentious or overtly hipster.