The cat drinks more, but ...
It provides regular hydration for our cat, which is great, but there are a few issues:
Sometimes, the water leaks all of a sudden, leaving the floor wet.
The filter was glued to a plastic holder and was very difficult to take off; we managed in the end, and hopefully, the next filters will be easier to change.
Nevertheless, we are happy with it, and it seems that our cat is as well because before, he hardly drank any water, and now he drinks it regularly.