I used Den boomband for around a year. I would say it was not a very good experience. The main issue is speed its relatively slow than what they promise. I using it at Delhi ( ganesh nagar) the connection was also not very reliable. When I was using they used to give 5 mbps for 30 gb and after that 1 mbps for around ₹600 which costly as compared to other service providers and service is also not good.