What made me opt for this ISP is it's reliability, my friend had a good experience with them and he recommended this to me. Whenever I had issues with the connection I called the customer service and they solved the issue over the call itself.
The speed is so fast that one day I downloaded an app of 42mb in just 3 seconds, youtube works just flawlessly without buffering. The speed is good even after you lapse the limit, I mean the downgraded speed is good too.
The service support is very quick, it just took them 2 days to install the broadband at my place. Also they have a toll free customer service number which you can call in case of any issues
