I picked up the Palm Zipper by Chef'n in a kitchen store in Ashland, Oregon this summer. Thing 1 just got his braces on, and would not be able to eat corn on the cob for the next two years. (What? No sweet corn? Inconceivable!) And after he's done with braces, Thing 2 will be in the same boat.
I've tried using various methods to get corn off the cob so I could freeze it. I've used the corn cutter that looks like a giant bobby pin with a circle of steel in the middle of it - the cobs never really fit correctly, especially the really fat ones. I've tried cutting it off the cob with a knife, which results in lots of half-kernals, kernals with the tops sliced off, etc. Not to mention the fact that I always feel like one of my fingers is in danger of getting sliced. I needed something better.
So last night I tried the Palm Zipper for the first time (yeah, the corn is that late this year). Woo-hoo! I love it! The thing is wicked sharp. It slices through the corn like a hot knife through butter. Given my history with sharp objects, I didn't hold the ear in the palm of my hand, but set one end on a plate, and held it upright with a corn holder on the other end. Zip zip zip. It only takes off two rows at a time, and could maybe be a little bit deeper, but full kernals came right off the cob with very little waste. I also like the fact that it's nice and small - no big mandolin-style set-up. It's a keeper in my book.