Old, but plenty of food places and slot machines and little shops to spend your time in while you're waiting for pick up or departure.
Its pretty run down, they seriously should remodel this place, well at least in the southwest airlines section of the airport. But its pretty quick to get your bags and check in and security check point was really long....
BUT EXPECT TO COME EARLIER THAN USUAL its Vegas, theres thousands of people flying in and hour every hour!