This airport has a lot of traffic coming in and out which is probably why they are expanding the airport. You have a great view of the Las Vegas Strip too as yo take off and land. I've always flew with United Airlines and the checking line is always long and the way it is set up doesn't make sense. There isn't enough room for people to use the easycheckin machines next to each other so there's always empty machines but you still have to wait. Very inefficient. The security line is always long too. The only thing speedy is the tram that takes you between the gates. Terminal 3 with the D Gates has a lot more food choices which is awesome. They have CPK, Rubys Dinette, Burke in a box just to name a few. The airport is pretty clean for the amount of people shuffled though here. I've never encountered any flight delays either.
Oh and in case you have to gamble right when you get off the plane or get that last pull on a slot machine, there are some spread throughout the airport. "Wheel ... of ... Fortune!" can be heard throughout the airport.
The main point I would like to make is just make sure you allow enough time to catch your flight. ^_^*~