Was so excited to try the Drinkwell ½ Gallon Pet Fountain. Out of the box you have everything you need along with directions for assembly. The fountain is a really good size especially for two cats. My cats were leery at first but after about 30 minutes of staring they finally gave it a try. They love it... I like that the water never gets stagnant to where you get a film of "yuck" like with just a regular pet water bowl. This seems much more healthy.  I would definitely suggest this pet fountain to any animal lover.