I've had this barrel over a year now. I've change the batteries once. I don't use rechargeable batteries, but do Use Duracell batteries.
It's great to have a self operating trashcan that opens and closes with a wave of a hand.
The bag stays hidden. I've seen reviews stating you can see the bag- it you bring the trash bag through the loop and over, it's easy to just tuck it in.
It's also easy to clean and I can't see smudges!!
My favorite thing about this is when I'm changing the bag I have a habit of placing the top onto the floor. Cats being nosy creatures have to know what's going on. It is hysterical watching my fur baby prance over to see what is on the floor, he always activates the barrel to to open. Once he is use to the lead being open it then shuts by itself. He then plays this game with the lid opening and closing. If you have a cat or dog, you'll have to test that out