I have been using this network since a long time.
The only reason is that I have given this number for all the official and unofficial purposes, and I am too lazy to get that changed everywhere, and yeah my cellphone suppourts dual sim, hence I have an alternative.
Now coming to the point, this network sucks big time! connectivity is really poor, and most of the time even if it is connected, the call drops abruptly while I m in a conversation.
The only reason I haven’t thrown away the sim card apart from the one mentioned above is that its internet tariff is relatively cheap as compared to other providers and yeah, no roaming all over India is also an added perk.