We have 3 of these in the house, next to each litter box. I checked out the other 2 brands (Litter Locker and Litter Genie), but liked this design the best. You open the lid with your food, and then push spring loaded lid down with the scoop. I didn't like the other designs which require you to pull out a handle to let the stuff drop below it. These are really convenient, and work just as described. Refill liners are much cheaper if you sign up for the subscription at Amazon.