Instruct: Classify the given Amazon review as either positive or negative.
Query: Got the right size, but it doesn't work....

There is a design flaw in that it only stirs the bottom 1/4" of the jar as some other reviewers have mentioned. Tried it vertical and horizontal and also tried long duration of cranking, but the gravitational pull where I am (500' above sea level) isn't strong enough to draw the unstirred peanut butter into the stirring rod. It probably works fine in death valley but am going to return it since it's summer there now which would boil the peanut butter into a stirred state.On the bright side, the rod was clean enough after removing to put back in the package for return shipping. I was really hoping this gadget would work.