There are some good things and some bad when it comes to McCarran. Personally, I don't think being in an airport is ever a good thing and rarely is there never a hassle.
Pros:
-Security moves relatively quickly.
-Economy Parking is pretty painless
-Trams to other terminals are efficient
-Baggage claim is large and is average wait time compared with other airports
Cons:
-Passenger pickup has no cell phone zone and only 2 lanes.
-Ticketing can be super crowded (probably airlines fault)
-Main terminal is old and outdated.
-Few spots to sit and charge phones, computers, etc.
-Many more that I'll update later.
McCarran is just your normal airport. Get in and get out as fast as you can.