I tried this blade out in my Weishi-9306-vs-Merkur-34c experiment, and I have to say I received a close, comfortable shave with these. They don't give much audio feedback though, but that might be because my lather was particularly slick and I started out pre-treating my face with an almond-castor-oil blend. I wouldn't recommend using these in the milder Weishi, but a good heavy Merkur razor should bring out the sharpness of the blade.