I purchased Rs.1700/- M Blaze dongle a few days back and it is really working well. It only took a few hours for activation and speeds uto 1.8 MbPS were recorded though average was about 1 Mbps sometimes going upto 100 KbPS.
Installation was hassle free and there was no disconnection so far. The first month is unlimited download and a good feature. It is post paid and hence You have a watch and control. My Reliance net connect is very unreliable and expensive and I will dump it after a few days if Mblaze service continues to be good enough.
My experience is limited and I will get back if it gets worse. I live in Hyderabad and am yet to try it in smaller places.