This water filter has saved me a lot of money in water. The AquaSystem filter is a basic unit that removes chlorine, particles, metals and chemicals from water. When I first move to our home I went to the store for water almost every week. The water where I live is so heavy I can only use this water to wash the car. I feel safer by knowing that we are preparing the food without water residues that can harm our health. Because the water is heavier where I live I change the filter every 3 month to have a good functional filter every time. The two stage filter price is only 6 bucks, that compared to the number of gallons of water that I purchased every week is a great and huge saving. Overall this water filter is a great deal and saves hundreds of dollars every year. I simply know of what this water filter is made of, and other similar countertop filters are sold for hundreds of dollars, and it has the same filter inside. I was a sales representative for a water filtration company and I sold a similar unit with a simple one stage carbon filter for $249.99, I just feel guilty about that.