They are quite luxurious with food service and restrooms. Riders range from families to tourists to business people, although there are express buses specifically for businesspeople between large cities like Istanbul and Ankara. One can purchase tickets from specialized bus ticket agencies located throughout the city. The agencies are open almost continuously.
Buses depart from particular stations usually located out of town.
Free shuttle buses run back and forth from the ticket agency to the outlying stations. The stations themselves vary in organizational level and can be crowded. Most signs in the station are in Turkish only.