Always when you fly in or out from Las Vegas you can trust that those guys will handle it. Over 40 million passenger a year requires an organization smooth as a perfectly ticking swiss clockwork. Checkin and luggage claim will be fast, and wont waste your precious time here in wonderland.
This is the place where you begin your adventure in the crazy vegas and most probably(read hopefully) also end your trip. However leaving the airport is not the end. It is not even the beginning of the end. But it is, perhaps, the end of the beginning. And when you wanna transfer from airport, go by shuttle, cab or limo to the city, but make sure they dont go freeway unless you are going downtown off rush hours.
Even if you dont want to, you will have to leave eventually, and when you do, the last thing you will get reminded about is the classic phrase.
What happens in vegas, stays in vegas...