A good speed is plus, but it eats a lot of unnecessary data. I use it on regular basis and my 5 GB of data finishes just in 10 days. Only in surfing. No downloading. It loads unnecessary data available on each and every page. And after that 2G service of this dongle is pathetic.
Have to wait for hours for just a Google Page to load. If automatic updates are ON on your computer, then just wait and watch. It will eat up all the MBs and GBs. Airtel should bring in some cheaper data plans. Or at-least give 3G after 4G completion(plans are there but for this advantage, they are too expensive).
I would say No to it, if any one ask me for recommendation.