Great info! Now I have to decide whether to take buses or rent a car. Will the buses get you tourist spots like Xel-Ha, Xcaret, Tulum . . . etc? Also, have to decide between Cancun and Playa with my teenagers 13 and 17. When you say Cancun has a younger crowd, I assume you mean 18, 19, and 20 or 30 somethings as opposed to high schoolers.