I've rented cars in 20 states and a dozen countries and this is EASILY the best rental facility i've ever used.
one communal rental bus for all agencies means you never have to weep as the other guy's bus passes your stop. 24 hour service means you're never stuck when you have a late plane. 10 minute shuttle ride from/to the airport means you're not spending your life looking at tarmac. airline information kiosks let you check-in for flights before you get on the returning shuttle. (you can also jam money in a slot machine if you feel like you haven't lost quite enough yet.)
and all this revolves around what has to be the cheapest major city rental cars in the US (i just rented for $32 for two days, including all taxes and fees this past weekened ... i FAR prefer taking a rental car into death valley over one of my own).
as a tourist you can rent a car -even for several days- cheaper than taking a cab. casino parking is always free and guaranteed at any hotel you stay at. lines for the valet are always considerably shorter than those for cabs.
in vegas? rent a car. save some dough. save more time.