I have been to McCarran a few times now while flying into Las Vegas because it's only an hour and a half flight from Sacramento. The airport itself is rather large and confusing because there are multi levels and signage isn't that great.
Pro Tip: The Uber and Lyft pick up spot is in the Parking Garage. You have to leave the airport and get picked up on the "Gold Level" of the parking garage.
Pro Tip Two: There are two security checkpoints. One for Gates A, B and C and one for Gates D and E. You can't go to one checkpoint if your gate is in the other and they aren't accessible from each other. Luckily there is a Port of Subs Sandwich location in both Gates B and D so I didn't have to have a meltdown.
Security is OK. Baggage claim is OK. Restaurant selection is OK to poor because there isn't many! I was disappointed to see when I flew in at 10:20pm that everything was closed already and the only food available was in the snack shop. Lame!
There are (of course) slot machines at the airport and I was surprised that people were actually using them. I've never heard of anyone hitting it big at an airport slot machine, but I guess there's a first time for everything.
I'm sure I will find myself at McCarran again, but it's not one of my favorite airports.