I had an early flight out of McCarran and was in desperate need of coffee. Coffee Bean & Tea was the only place open at 4am, so I stopped in. I got a medium sized Pumpkin Latte, usually one of my favorite coffee drinks. It tasted alright, I've definitely had better at Starbucks but for 4am anything with caffeine was fine by me. It is a little pricey, but you might as well expect that buying anything at the airport.
I give this place 4 stars, not because their coffee is spectacular, but because they understand early morning travelers just need coffee period.