Last month I had booked my ticket for Indigo airlines from Hyderabad to Delhi round trip via Yatra.com and I am satisfied with Yatra.com service.
Booking ticket was hassle free. Customer service is excellent . I had some problem while online payment, immediately I got a call from customer care of yatra.com and they assisted in making payment.
They had send several mails regarding tickets and other details. So I had a good experience with Yatra.com .Their website is also good, booking tickets there is an easy process, any body can do it and their customer support is always ready to help in case of any problem.