I tried an open-comb razor (of unknown manufacture) for the first time today and what a surprise: I never used a razor as aggressive as this. Although I had only one very small knick it felt as though I was taking a very thin layer of skin off my face, but no razor burn. I usually use either a Merkur 38C or a Edwin Jagger DE Chatsworth, which has a Merkur HD head, and find I get excellent shaves with each. For the last while I've been using Derby blades and used one in the open-comb along with Frasers' cream. I guess my technique hasn't developed yet to the stage where I can use an open-comb with impunity; tried modifying the angle and watching the pressure, but it didn't help. Any suggestions on how I might change things in the future? As of now I'l be putting the open-comb at the back of the cabinet for another go some time in the future, absent any sound advice.