Just remember, you asked for it 😉 I will be offended by TLDR response.😜

We rode ETN from Queretaro to CDMX. The managers of the buses were very diligent about calling out the bus in the waiting room and checking tickets. They would call out for passengers before departure. Once on the bus, it felt like each of us had a plush sofa and maximum foot room. It was a better than flying experience.

The AU bus from CDMX to Puebla was a step down in all respects, but there really were no problems. It was simply lesser across the board, like going from a Cadillac to a Ford Taurus.

The ADO bus from Puebla back to Mexico City was just a little less comfortable than the AU. It might have been our particular seats, but less room. Like going from a Taurus to a Sentra. There was no sense that if we didn't have our act together that ADO would have checked for ticketed passengers. Their ground operation seemed to be the driver alone.

All of them were close or on schedule. All were well piloted. My feeling was that I could go the length of Mexico on ETN in fine comfort. I could also do it on the others, but I'd break it up on them.

We used 4 different bus terminals. Queretaro's was top notch in all respects. The Mexico City Norte was big but well laid out. Santa Martha Acatlitla was small and clean with a lot of dogs to keep you entertained. Puebla's is huge and signage a little less clear. I gave myself extra time to get around there. TAPO San Lazaro in CDMX was pleasant enough that I'd have hung around to eat in the open air.