The Toastmaster 6203 Popcorn Popper left a good half the kernels unpopped. An even larger problem is that half of the popped kernels ended up scattered all over the kitchen because the air was blowing so hard they flew out of the large, deep bowl. That bowl got extremely hot while popping too.After this one, I tried thePresto 04820 PopLite Hot Air Corn Popperwhich was far better in all three categories. That is, nearly all of the kernels popped, nearly all the popped corn ended up in the bowl instead of scattered, and the bowl didn't get very hot.