I'd like to take the overnighter from Puerto Escondido to San Cristobal de Las Casas, but Mexexperience.com warns that:
If you are traveling in the southern regions of Mexico, particularly in Chiapas between Tuxtla Gutierrez, San Cristobal de las Casas and Palenque, note that you should not drive or take a bus overnight in this region. Roads are safe during the day, but the roads which connect these places pass through some of Mexico's most remote and rugged natural territories.
I had never heard this before, but now I'm worried. What do y'all think.