If you plan on doing anything that a cruiser would do, you pay more....such as eating, shopping, activities such as boating and sea doos, etc. But, if you stick with diving and hotels, it's inexpensive....since the cruisers haven't driven up those prices. A bargain destinantion with some of the best diving in the world! Summer is very hot, very humid, very uncomfortable. Nov-Feb is optimum, with little rainfall. Water temp is 78-81F year round. CAUTION- AVOID BIKE AND SCOOTER RENTALS....THEY ARE EXTREMELY DANGEROUS AND ACCIDENTS ARE SEEN DAILY. USE TAXIS IF POSSIBLE INSTEAD OF RENTAL CARS TO AVOID PROBLEMS WITH POLICE WHO SETUP CHECKPOINTS AND HARRASS AMERICAN DRIVERS ON OCCASSION. TAXIS ON COZUMEL ARE GENERALLY HONEST, BUT WEAR YOUR SEATBELT. THE HIGHWAYS ARE DANGEROUS AND EVERYONE DRIVES WITH RECKLESS ABANDON THAT HAS TO BE SEEN TO BE BELIEVED.