I have been using MTS Mblaze since last year. The performance has been really good. On average I always get atleast 1.5-2 MBPS speed.
Also it comes with wifi which can connect upto 6 devices.
Pros:
Good speed
affordable internet packs( I am using 700 Rs for 14 GB- 7gb day, 7 gb night)
wifi support
can connect upto 6 devices.
Cons:
Not good connectivity outside Delhi NCR.(like UP, MP etc)
So if you want to use internet in NCR, you can go for MTS. CHeers.