My husband and I used Discovery Mundo for our trip from Cancun Airport to the ferry to Isla Mujeres.

For $66 US total round trip, this is definitely the way to go. They were waiting for us when we arrived at the airport, and a friendly and safe driver took us in a clean, air-conditioned private van to the ferry terminal.

On our return trip, we arrived early, and our driver was already waiting for us- they got us to the airport in plenty of time for our flight.

Their communication was very thorough throughout. I can not say enough good things! Definitely worth the $$.