Yes, Reliance 3 is pretty stable, and they've got awesome coverage. The speed is an issue, so I can't even dream of using it as a primary connection. I tried doing that, and couldn't get any work done at all. I'm using my Reliance 3 as a backup connection. Are you referring to Photon? They've got some rather shitty plans with very low data.
I can't seem to find a 1Mbit non-FUP plan on BSNLs website, was it discontinued or a special offer?