I saw this topic, but the latest that I could find was a post from 2009. I'm going to be in Cancun at the end of August to beginning of September 2012. I'm staying initially on Isa Mujures. I'd like to take the Ado bus on a Sunday (preferably very early) and go to Playa Del Carmen for a day and a half. Do the buses run on Sunday? Is there a shortened schedule? I can make my way over to Downtown Cancun, and I believe there is a bus terminal there. correct? Any idea of cost, I heard $10 USD one way.