I couldn't imagine riding one for more than a day. I used to take the overnight bus from Calgary, Alta to Vancouver, BC once or twice a year. In the 80's, not so bad. By 1990s it seemed to be the transportation of choice for schizos and druggies.
Worst bus trip was on a run from Victoria, BC to Port Hardy, about a 7hr trip. By the time we left Campbell River all that was left on board was 4 of us and over a dozen convicts just released from jail that morning. Listening to those scumbags talk, all I could think of was my prohibited HK93 rifle secured ion my bag in the luggage compartment below me. Glad Greyhound is gone.