The Platinum is more expensive than both the previous models I was looking at but it is definitely worth the extra cost. It's like the company took all the criticism and praise for both their design and their competitors and created an exceptional pet drinking fountain.
I have had my Platinum for about 5 months now and have been very pleased with it. Drinking plenty of water is as essential for your pet’s health as it is for your own. By providing a constant 5-inch stream of falling water, the innovative Platinum Pet Fountain makes drinking more attractive and fun for your pet, as well as more convenient for you. No longer will your pet have to slurp stagnant water from a traditional bowl. The simple, safe Platinum Pet Fountain holds 168 fluid ounces, keeping your pet out of your sinks and toilets.
The filter lasts 3 months (about 2 months if you have a multiple cat household). It also has a large reservoir. As a result, I only have to fill the tank about 2-3 times a week for my 4 cats. I also make sure I clean the entire unit weekly. The pump should also be taken apart and cleaned periodically, which is easy to do as shown in the instructions. I usually clean the pumping mechanism out every two weeks. I highly recommend this product.