I am not sure if anyone hear has tried them, I am looking to gather a little intel from the more knowledgeable and pass it along to people on another message board.

A person was asking about Dollar Shave Club originally, and the topic meandered to ways to make shaving more economical. Of course I encourage straight razors, but another brought up the cartridge blade sharpeners. So I was curious if anyone hear had used them, written reviews of them, or anything. To me, they come acrossed as a little to good to be true, but who knows? So any info would be great.