As someone who fearlessly uses public transit to get to/from airports when I can, I fully expected the Vegas Monorail to connect to the airport. Shame on me for not researching that further, but shame on Vegas for pandering to the cabbies. The Monorail comes so close, but not quite because the airport is setup to be a boon for the cab drivers. Isn't there enough demand on the Strip? Sigh...$40 spent round trip to get to/from an airport so close was frustrating. But what else should expect for Vegas.
Also frustrating was the hike to get to the D gates. A bit rough for a 6am flight, or any other flight for that matter. I will say that the airport was surprisingly clean, and signs were informative. It was also nice that some restaurants were open at 4:30am on a Monday, and I recommend Burke in the Box if you're in the D gate area.
Overall not a terrible airport, but am certainly "Meh. I've experienced better."