I am very satisfied!
You can tell when the water is running low because the flow sounds louder. I usually refill it 1-2 times a week (with 2 cats).
I clean it once a week with water and a little vinegar, and less often I use dish detergent. The slime that collects in the inner corners I clean with a cotton swab because it doesn't come off with just water/sponge.
The filter lasts over a month. It's good to change it before it turns yellow. Also, it's good to open the little motor from time to time for internal cleaning (I use a cotton swab there too).
I've had it for 7 months and it works great! Running water definitely appeals to cats more than standing water. Personally, I consider it value for money!

The battery has no power at all and the water does not come out. Too much money for something so small. Sorry, but it's a no from me.

My cat has loved it! Even though there are other bowls with water, it prefers the running water from the fountain.

Very nice and big but my cats are afraid of it, what can I say… I really wanted them to like it but they don't….

It did its job and more. It takes a little time for the cat to get used to it, I pretended to drink from it to show him and I stopped giving him water from bowls completely. Advice because my cat cut the cable, sprinkle the cable with pepper

the fountain is a bit low
my cats definitely find clean water all the time but they have to turn their heads to the side to drink

The installation is quite easy. It would be good to mention that it only has USB and no adapter. It is completely silent. My cat has just played with it so far and hasn't tried to drink water. It will show in a few days.

Very good and quiet, my cats loved it. Minus one star for its price compared to its quality and also for only providing the USB cable without a charger

Unfortunately nowhere in the description is mentioned that this product is only with USB connection. The quality of this product is not worth it what you pay for! 33€ for cheap plastic.