This is an updated review: For few months Alliance broadband net is more or less stable. I am now hiring a basic unlimited connection(Prime package). Considering the price(550+12.36% VAT) it is better than wireless dongles. Wireless dongles charge higher and suffer from 3G/EDGE network issues.
But I am not saying it is the best because many times users have complained for sluggish network. So test it for sometime for network issues in your area before jumping on to some costly package.