I was using Tata Indicom Plug to Whiz connection for some time. The speed was below average. U cant go for online reservations being slow connection mostly u have to loose ur money in the transaction and claim ur banks for reversal of money.
That too its based on the tower strength the speed of connectivity. Works fine in Major cities I have used in Chennai, Bangalore & Coimbatore. But if u plan to take apart from cities (where u really need when they are no browsing centres, ooh cant say...U cant use it).
But they assure u can take to any part of india. Hope like politicians they too forgot that India has villages and concentrate on Cities only. But I was very much statisfied with the customer support. A simple call will do for ur problem to be solved. They confirm u twice before closing the complaint call. At door step irrespective of location they provide u assistance.