I have been using MTS Mblaze for about a week now. I am located at Mehrauli, New Delhi and getting a descent speed of 1 to 2 MBPS. Some may say that they advertise 3.1 MBPS, but that may be in ideal condition and as a reason they claim its Upto 3.1 MBPS. I am yet to test their so called roaming service, but hope it wont disappoint me going by the present experience. But some issues like the speed fluctuations are there and sometimes it becomes completely Idle for few moments(No data transfer). It may be problem with the local tower and I hope its temporary. Overall the service has been satisfactory so far. But still I think there is a lot of scope for improvement, especially the cost-it should come down in future.