Well it has been 4 months I have been using DEN Boomband. I using the 650 Rs plan which gives 5Mbps speed.
The speed is good you can do everything which you want to do on internet with this speed like download some large files, movies, live stream something, and it also gives a good surfing experience.
The quality of connection is good and the connection is stable you will not get a chance to complaint. The support is also fair they almost resolve problems instantly and there is hardly any problem with the connection.
The support staff is fair and it provides good support.
I will recommend anyone who wants a good internet connection at a fair price without any difficulties living in DELHI/NCR.