The filter is easy and quick to fit. The hardest part for me was resetting the tap indicator light due to its location. The water flows clear and tastes and smells good.
My only criticism is the price. It seems expensive considering the advertised life is only 3 months. And even if you break that down to a cost per day, it could seem expensive, when compared to using a jug and filters.
However, it does the job, and does it well.
Update
I'm now on my fourth cartridge, and like other reviewers, have found that the life of 3 months seems to be very cautious. After experimenting with the first cartridge, I now double the life for cartridges without any apparent adverse problems - taste and smell remain ok, and the water stays clear. So when the tap light turns red, I now reset it to start again.