I have taken Caribe Tours once, about 4 years ago, that was enough. That was from POP to STI, the driver drove very fast, keeping the accelerator in the floor (it was easy to hear the engine running), with a slight scent of diesel fumes inside...
While driving (not on a bus), especially between POP-Navarrete, we have seen plenty of "professional" drivers, and mostly the color of the these buses is bright yellow. While passing other vehicles with full bus loads, I have seen many times unbelievable driving.
Whenever we need to take a bus in the country, it?s Metro, I could be wrong (no references nor stats), but I think Metro is in the news much less, and I actually feel safe on those buses. Sure, they don?t have as much service in terms of frequent departures, but we have learned to plan our trips accordingly.
I still recall the accident from couple of years back, when Caribe Tours went out of road on Duarte Highway, they posted an image of the bus crashed in forest... I have not yet seen similar news about other bus companies here.