if you have a chance to travel to Palenque area, rather do it instead of doing the one day trip. if you dont have it, this is I guess the cheapest version you can do from San Christobal. the minivan is really small, the roads are bad...but for us the waterfalls + palenque was worth. it is only about where are the limits of your comfort and how many time do you have for travels.

The things you see and do are great. The minivan is much to small voor tall persons like me. The driver has no other option than to race over the curvy and bumpy mountainroads to livecto his timeschedule To be honest i didnt have no other option... At 4 am you are in front of your hotel at 10.30 you are back totallly shaked up cus of the many bumps and curves in the roads. The best place to do this tour from is Palengue an not San Crostobel de las Casas. De driver was nice (Jesus) The sites are worth visiting and Chiapaa is beautifull.

Agua Azul and Palenque are both excellent sites for different reasons. Waterfalls vs Mayan Temples. Each was worth the trip. To combine both in a day is efficient but exhausting. Pickup time is 4 am. Dropoff time is 11 pm. Most of the time is spent in the van, navigating narrow mountain roads and topes. En route there are stops for food and bathroom breaks. At the break locations and the main attractions, locals will try to sell you food and tourist keepsakes. Consider splitting the trip in two if you have the time.