This has been discussed repeatedly in the Coz forums, but for those of us who can't get a non-stop to Coz from a convenient airport, the "bag-drag" from Cancun can be a very attractive option. For me,, a non-stop to Cancun is much cheaper than flying to Coz, and avoids having to connect in ATL (yuck) or MIA (nightmare). A pre-arranged private taxi gets you to the ferry terminal in Playa quite comfortably, the ferry is quick, and you can get a taxi from the ferry terminal. All told the travel time and cost worked out to be less for us than direct flying to Coz. And you don't have to deal with the shuttle mafia at the Coz airport.