[Phalanx]

Forget the micro-crap.
Not really hard to go ahead and make non-microwave popcorn.
You can either add a little olive oil, or a mixture of butter/oil then use a deep pan over moderate heat. Make sure it's one with a lid. "Roll" the pan as you go, making the kernels move in a circular motion to ensure a relatively even heating/no burning. Add any additional butter, salt, or other seasonings at the end, shake, serve. (I personally really like lemon juice, tobasco and pepper, the girl sometimes coats the stuff in nutella)
Alternatively, get a popcorn maker...little plug-in unit. They're fairly cheap to buy, and very quick and easy to use. Either of these take only slightly longer than the microwave stuff, and come out much better.

When you buy microwave popcorn, you're paying for an inferior, overpriced product. The technology isn't yet really perfected, hence the burning, and often disproportionate butter/seasoning covering. EG- For lazy people that settle.
Not sure about those popping pan things you put over the grill...I assume they're a more pre-made version of the pan/pot method anyways.

Either of the aforementioned methods give you a better tasting popcorn, not to mention when you get yourself a big old bag of kernels, it's FAR cheaper.