McCarran Airport is an average aiport - not sure why I expected more, but I did. That being said, the airport is pretty efficient at what it does - get as many people from all over the world to the Strip as fast as possible.
Some notes on what to expect
1) Outlets are very sparse on the concourse - don't expect to be able to charge your devices.
2) There are plenty of outlets available to provide power to the hundreds of slot machines in the center of the concourse. Do not unplug a slot machine to charge your phone - I don't think the slot attendants would be understanding of your power needs.
3) McCarran is one of those airports that have a train that takes you from the gates to the terminal. Leave extra time to get to and from the gates.
4) Casinos do not have free shuttles from the airport - ya gotta cab it.
5) The cab line looks daunting, but moves very quickly
6) Even though you can see the strip from the airport, it is probably going to be about a $20 cab ride. (With tip)
7) There are few - if any - airline lounges in this aiport. However they do have a lounge - Club Las - that is open to the public for day passes.
8) This is a large airport - watch where you are going so you don't get lost.