Oh geez, I missed that... eeek.... now, I may be wrong (again) here, but AFAIK FYPSA is second class at best. Apart from that, it generally gets reviews on about the same level as your last hotel. They are considered the cheapest of the cheap for these long hauls.
I tried checking the website out of curiosity, but hot damn... what a piece of trash. They even still have the Latin text at the bottom where the "calendar" is supposed to be.
For safety purposes, I'd recommend people avoid this line and go with a more reputable one, like ADO... which only has evening departures. Because why risk one's life to save a few pesos unless you, you know, need to? ;)