I settled for Amazon Fire TV Stick and continued with Airtel's normal HD box. It worked out very well. Fire TV Stick has almost everything that Airtel's Internet TV box could have, all Indian TV apps, including Live TV streaming.^^^ Do you use Airtel's Internet STB?
How is performance in terms of conventional usage (like powering ON, changing channels)?
I was considering it, but was not sure after reading negative reviews about lags while performing some actions, so didn't opt for it.