I travelled from Manipal to trivandrum by kallada travels. It was the worst trip of my life. The bus was uncomfortable and the staff rude. The trip was delayed by 6 hours thanks to a conductor who was constantly stopping the bus to board non scheduled passenegers. In spite of the delay he was not willing to stop the bus for toilet or breakfast. In the end the bus was stopped by a road transport officer as a passenger who disembarked had complained to him about the bad service. I took another bus for the last leg of the trip.