I always love coming to this airport. As soon as you land you get the Vegas experience. There are slot machines, casino flare, overpriced food and tons of exceptional people watching to be had here. If you're staying at the MGM you can easily check in at their both in the airport.
As far as airports go it's one of the more organized places that I've traveled through. There's a tram that guides you to your gate after bag check in as well. Stay close to your party because you can easily get separated or lost from your party.
Also be awake for your landing as well. You don't want to miss the view of the strip from the air.