I had no trouble at all going through customs. It was like any airport I've been in. As for the hour or so ride to the hotel, you usually get a complimentary shuttle from your resort that picks you up. Usually included in the price. You just have to make sure that when you get out of the terminal you get in the right vehicle and ignore all the other guys trying to give you a ride. As long as you follow the instructions and get in your resort's bus or shuttle you're golden. The actual road is extremely well maintained and patrolled every so often by what I guess is the Federal police or the army, I couldn't tell which. The shuttle goes something like 90 KPH the whole time, except when you have to go through Playa del Carmen.