I bought this on a whim a few weeks ago and have used it once or twice a week since.  I think the key to fewer unpopped kernels is to use high quality like Orville Reddenbacher and not generic store brand.  When I use Orville there's been only a half dozen or so kernels vs a small handful of generic kernels left.  Takes about 3 minutes or so and you need to listen and take it out sooner if the popping stops.   Use as serving bowl, toss in dishwasher.  It's much easier than hauling out the big popcorn popper.