One of the most easily accessible, SANELY designed (suck it, Denver) airports I've ever had the pleasure of dealing with. I could see a huge security line towards the D Concourse and thought I would be in line for hours. However, security moved everyone through quickly and efficiently with a great deal of organization. Normally when you see a line, it means there's like 1 TSA agent checking IDs. At McCarran, they had tons of agents and tons of X-rays. I understand they see lots of passengers, but I swear I've been to airports twice this size (again, eat my shorts, Denver) that are simply understaffed and under-equipped to handle the throngs. Oh, and you obviously can't beat the fact that the field is a stone's throw from the strip.