I've connected through McCarran before - going to and fro to California - but this is the first time I've flown in and out of the Airport.
Arrival was no problem. Deplaned and followed the signs to baggage claim - via the train. The baggage claim area is a bit cluttered with all of the gambling machines interspersed betwixt and between! But my bag arrived just as I got to the carousel - so no worries there. Walked out to the Taxi area - informed the guy I needed a cab that accepted plastic - and he got me into the right cab immediately!
On the return trip - getting dropped off and checked in via the United Airline ticket counter was easy (via the Premier line). Security was also quick and painless, although they X-Ray machine conveyor belt spilled my loose change (a TSA agent immediately got down on the floor and retrieved all of my change and with good cheer - so kudos for that!)
Ride back to the D Concourse via the train was quick, and then finding my Gate was no problem. Lots of dining, drinking, and retail options! United does not have a Red Carpet Club at this Airport - but they do have a reciprocal agreement with Continental Airlines - so you can access their President's Club.
I hit up the Starbucks (coffee) at the end of the D Concourse, the Presidents Club (sit and work), Burger King (lunch), the Wild Gecko (because the name is cool), and Hudson News (resupply on bottled water and reading material before getting on the plane to Denver.
Of course there are gambling machines everywhere - but they are of no interest to me.