Hit or miss...but mostly a hit. Only once has it been 15 min late in the last 3 years/6+ times I've been to Vegas. That was going from Imperial Palace to McCarran and you could blame construction for that. I always reserve online. That's probably why. I hear it's not ideal when you do everything via phone and at the airport. It's your cheapest option back and forth from LAS. I've had mostly empty buses and pleasant drivers. I'll take those odds when in Vegas.