Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Watts WP2BVC Premier Two-Stage Microbiological Pur...

I am reviewing this product on the basis of a purchase for my mother, even though I have the very same brand just different features than hers, when first installed by a professional installer, there was some modification done when installing, other than that it was easy to install like all Watts systems, after installation, my mother and installer both tasted the water from which the water came from these two filters, from their opinion the water did not taste very good, comparing that to her older system, she claims she was not impressed by the water quality at first, but after a day or two of use, she claims the water quality is much better and more to what she had expected from Watts reverse osmosis. I would recommend purchasing a four stage reverse osmosis Watts brand (own four stage reverse osmosis watts brand) very pleased with the four stage, water quality is excellent and the taste is clean and refreshing, well worth the extra money.