I have seen lots of posts asking questions about return transfers from Cancun Airport to Holbox.
You can´t go wrong with the one that we used. The driver was waiting at the Airport with our name on a board, and knew all the best places to stop for a drink or go to the toilet. Smart new, air-conditioned 8 seater bus.
Was waiting for us in Chiquila us as we departed the ferry from Holbox, and even stopped for five minutes in the Village of Solferino to show us the 1000 year old tree, where we took pictures.
And you can safely pay via PayPal.