Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This is a bottom-of-the-line machine

When my first unit didn't work properly, I had it replaced, but the new unit was no better - it just doesn't pop very well.I tried all kinds of different ideas to improve performance; I plugged the popper into different outlets, I weighted down the flip lids with quarters to prevent the kettle from spitting out unpopped kernels, I waited a long time to heat the unit, and then again to heat the oil before adding my kernels.With all my experiments, the very best scenario still left 1/4 - 1/3 of the kernels unpopped. Also, the stirring mechanism jammed as popped corn collected under the stirrers.There are other units available in the same price range with higher wattage that would probably work better.This one certainly does look cool, but I will stick with my stovetop until I can find a better quality unit.