This gadget is great. No more soap scum on the sink or in a soap dish. I have already ordered another one for the other bathroom. Don't know how I did without it before. It holds 16 oz. so it doesn't have to be filled often, You can adjust the amount of soap that is dispensed. The battery repacement is easy. Just slide out the little compartment at the bottom. Don't need a screwdriver to open like the one I bought somewhere else and took back. Who needs more work, to keep the bathroom clean!!!!