My experience with ZeroB Purifier has been really good. I have used an ro purifier of another leading brand but their servicewas so poor that I had to place a request on justdial. they connected me to ZeroB. the ZeroB service guys came and managed to get the purifier up and running in a day;s time. These guys seemed to be knowing their job quite well unlike the other company who are only interested in giving me buyback offer and push some new product of theirs.