Naksh-Soft for me! Used DHRU, as most of us, but support is ridiculously slow, and only asking for more money for everything.
Looked for opinions on others myself.
For GSM Genie there was this thread...
So not sure. In the end I chose Naksh.. and I'm happy with it.
As other said - support always there IF you need it.
But after the innitial setup and couple changes everything is smooth.