Ive had this one for a few months and love it the, filter can be used for a long time before it needs to be replaced. I love the fact that you can always check the ppm in the water and make sure its up to par. I can always tell when it needs to be changed as the quality of the water is way different. It takes a while to fill up but I dont mind since its cleaning my water. My kids love "coldie water" and love to pour it themselves. (with supervisor of course)