Seems to work OK, but is not super user-friendly and was perhaps engineered by a sadist or a cat. Have fun changing the batteries at THE BOTTOM of the unit without spilling the food left in the hopper or hanging in the chute. Oh, yeah. And, you will be changing batteries often. I read one review that indicated 8 months of battery life with daily use. Completely false based upon my experience. As an added feature, settings are lost with every battery change, so you will get lots of practice getting it set up again.