I bought this for my son, and he loves it, but when I had to help him with a health scare, I found that I didn't like it much at all, this the 3 stars.
The excess water reservoir fills almost immediately. It seemed that I had to empty it, after every fill of a glass, which meant that the small amount of water to be filtered was wasted.
This item would be perfect if it had separate fill and excess water sections, so that the one that fills up in just a minute or two could be emptied without having to dump ALL the water.
The hot water choice comes out nice and hot, and it fits well in his kitchen. It is very large, so it might not work well in a small kitchen or one with limited counter space.
It does save him from having to fill 10-15 jugs a week to have water, but the excess water area being IN the fill water is a not-too-bright idea that needs to be rethought.
The water tastes nice, and I was going to get one for my house, but the having to empty the reservoir after every use changed my mind quickly.