Great experience! Finding the bus in Yen Nghia is easy. Enter the bus station and wait under the sign that says "Mai Chau". The bus pulled up at 9:30AM for the 10AM ride. The bus had a few stops in the vicinity to pick up packages, and we finally set off at 10:15AM. Despite dropping off the packages at multiple locations, the bus arrived at Mai Chau at 1:15PM, exactly 3 hours since it started. Ride was smooth, driving was great. Although honking was done frequently, the ride never felt rash. Carry some earbuds and one could sleep well. Bus might be a tight squeeze for tall people, it is a standard seater bus. However, no complaints because of the really affordable pricing. No rest stops on the way, however, I guess the driver would stop if requested.