I have bought this Tata Swach Boost 27L Purifier.Built quality of Swach Boost is awesome.Looking good, easy to install.Tata done fabulous job.I have used small purifier and it give me awesome performance in worst condition.I took a step to buy this one.Good purifier for this price range.Something is better than nothing, if you don’t need UV and RO purifier then go for it.At least you will drink pure water from this.filter depends on the quality of water.After we used 27liters automatically locked the filter candle bulb.I am personelly used this so iam recommend to who want to buy this purifier.