Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good water filter

This unit was easy to setup and works well. The water taste changed for the better and the smell of the water is changed. I use this in conjuction with a brita water filter. I try not to buy bottled water and the combination of the brita and water guardian help in reducing the number of disposable plastic bottles. Considering bottled water quality is questionable and water quality locally is good, using local tap water to satisfy thirst is considerably cheaper using this beefy filter.In terms of water filtration, it is difficult for a laymen to tell the difference between filters but using the filter definitely reduces oder and changes taste.The reason for the 4 is like the previous reviewer, I had one of the attachments that diverts water fail on me. I will have to try and call them to get that fix, but overall water quality is improved.