I've never ridden on a truly comfortable bus, anywhere in the world, and I've been on buses of one form or another on four continents. Usually your typical 2x2 setup, reasonably clean charters, but not luxurious and never in any way comfortable. I'm always thankful that I'm only on them for some sort of intracity group tour.

I don't doubt that the limo liners are out there...love that photo upthread with the business-class-looking pods...but that's not what United is going to charter for you out of Vegas. They're going to get you the equivalent of the Dog.