We're booked on the Horizon for 12/15, and will be stopping in Costa Maya. We were intrigued by the Unimog off-road excursion, and tried to obtain information about booking independently, as is our wont. The trip is available only through the cruise line, and departs at ... are you ready??? ... 7:30 a.m!!! It's only about 4 hours long, leaving us until 4:00 to amuse ourselves. That's not all that bad; but we'd have to awaken at 5:00 a.m. (I don't get up that early to go to work!), miss breakfast (no arrangements other than room service - if I wanted to eat in a room, I'd stay home), and prepare to explore new horizons in a semi-comatose state (both us and the port). Celebrity is passing the buck to the tour operator, who makes the ultimate decision. But to even consider offering a choice at such an ungodly hour ... and this is not a trip for most seniors, many of whom arise early. It's uncomfortable, with considering jostling and jarring. These guys in Costa Maya are a bit new to the cruise game. I guess they want us to join them in a mid-day siesta. We'll do something else there, and at a more reasonable hour.