I have been using siti broadband from the last 3 months. One thing I can say about it is that it is very unreliable.
The net gets disconnected a lot of time and u got to contact ur service provider very often. As well as the time for which the net connection is available is also very bad, u got to login almost once in every 2 hours. As well as the monthly rental is also high. Overall I would suggest you not to opt for it.