I had applied for 50Gb/50mbps plan in delhi(1574498) and the installation was done on 27th Feb, 2016.
since then the speed has been in the range of 3 to 38mbps. Inconsistent and mornings are specially bad. 3mbps! its a joke. I had replaced Den & Airtel for greed of higher speed but I think a bad decision.
Only thing good about is the range of the modem they install(D-Link) with double antennas.
Complaints - I am still waiting for that Hathway superman Mr. Mirza with a tennis racket in hand to whack the speed.
Update on 15th Feb, 2017: I went for it again & now using it for over 4 months. Far better and good speed. quite satisfied,