I’ve always been perfectly satisfied with the manual method of cutting corn off the cob, but out of curiosity, I tried several different corn cutter gadgets to see if they offered any advantage. Two of the models I tried were similar in design but made of different materials: metal and plastic (center and far right in the photo). I had to exert so much pressure on the cob to force it over the built-in knife part that I felt sure I was going to cut myself eventually, and the kernels didn’t get cut neatly anyway. The other model (near right) worked slightly better, but I needed three hands to use it: one to hold the cob upright and stationary and two to hold either end of the gadget (as the package instructs) to work it back and forth down the cob. The bottom line: I’ll just stick with my knife, thanks.