I realized I've never reviewed these folks. My experiences with them have always been excellent in Sin City.
Two tips.
1) Join their "Blue Chip" program. It gets you past the lines and right to where the cars are. It's definitely worth it in a vacation city like Vegas.
2) Try their "Wild Card" promotion. You pay the price of a compact car and are guaranteed at least that class or better. I've never driven a compact when I've rented that. I've driven a Charger, Avenger, and Crown Vic when I've done this deal.
The negative is that once you get on their email list, it sticks around like a "social disease."