My cats were going through the water so quick and I needed a solution to keep the water fresh and full. This one gallon drinkwell pet fountain was the perfect solution to my problem. It was very easy to put together, took about 5 minutes, and the directions were very clear and easy. I have two cats and I do not have to refill their water for an entire week. In order to keep the fountain flowing nicely, I would recommend taking it apart and cleaning it every 1 to 2 weeks. my cat's absolutely love the waterfall feature and are always batting at the water flowing down. I love that the water is circulating and they aren't drinking stagnant water. Awesome pet fountain for a great value!