I like the concept of the premier pet fountain and have used a different brand in the past. There are many pluses to the fountain. Having a blind dog it makes it much easier for them to find the water because they can hear it. It keep filtered water fresh for your pet. 
The downside to this brand is the top is not deep enough so the dogs are not getting much water while drinking. The control to adjust the flow is also under the top portion so changing the flow is more involved.