I had been using my Gibbs only for neck shaving. Then the other day tried to shave my whole face at setting N. Burning, nicks, terrible. So I experimented and set it down to 1 today with a Wilkinson Sword blade. Lovely shave. No sign of any burn after I did the alum block rub. So I think the Gibbs can be a very unaggressive razor. Its only flaw is that it does not give as close a shave as a straight.