I used hathway sevice when I was in mumbai for 2 years.
In this time period it gave me an excellent service. The plans are also of very low cost compared to other broadbands. The main thing here is the excellent customer service. They responded each and every time I called positively and resolved my problem within a day.
Also we get some additional speed benefits like on torrents and google servers. Especially the play store app. The service they provided were consistent and I had no issues about the dropping down of speeds etc. They also returned us the installation charges at the time of leaving. Overall this had been a very good experience for me with such a stable connection and great customer service.
Concluding, I would definitely recommend one to go for this ISP