Sir, I had travelled a multiple number of times between Hyderabad-Chennai in Orange Travels AC Sleeper bus, and it was quite smooth and comfortable.
Recently during this February, I travelled from Chennai to Kumbakonam and vice versa in SETC Govt AC Sleeper bus. The journey was comfortable between Chennai and Vikravandi, due to the wide Grand Southern Trunk Road. But between Vikravandi & Kumbakonam, the roads had a lot of potholes, which made the journey somewhat uncomfortable.