I am using their 50 MBPS plan in Mumbai location, if its running smooth you will get almost around 47 MBPS and life is like heaven. But whenever something goes wrong / down you have to chase them all over. Seriously they are worst in providing service, and have common answer whenever you raised complain about anything "There is outage in your area and our team is working on it, which will take 1-2 hours".
And believer me their 1-2 hours sometimes ended after 1-2 days, and you will be lucky if you are able to reach them on phone again. They mostly hangup calls or put them on answering mode and hence you option left with you is to visit their office location( which is again not possible for most of us).
So I would suggest if you there is any better option available for Internet( who is providing good service), than dont go for Hathway.