Very sharp, big difference compared to BIC Astor and Gillette Platinum that I have tried.
The best so far.

I was not impressed as sharp as they all say, but it does a good job I would say.. maybe I got a defective batch.. overall I would say it is pretty good!

I have applied it to the Merkur 23C. It is indeed aggressive but not something crazy. So on a different machine than mine, I imagine (and expect) it to have different results and sensation.

Very sharp blade and fits perfectly with most machines. The only disadvantage is that it provides relatively few shaves. It leaves a lot after 4 shaves, and hardly cuts anything after 6.

I hooked up with Gillette King C. Compared to the blades that Gillette has inside, these are day and night. As others have said, it is a very good and sharp razor. It fits sensitive skin like a glove.

Beginner shavers, forget about mild blades, all they do is irritate since they require 2 to 3 passes. Go straight for Feather and with one pass, without any resistance, you have a baby smooth shave.

I have attached it to the MERKUR34C and I am very satisfied with the result! Judging as a beginner, I will say that it suits me well with the mild razor that I have. Of course, this has to do with the uniqueness of each person's skin, but for me, it is great

I am relatively new to traditional shaving and I bought these razors along with the Feather Double Edge Razor Popular, and now I wouldn't change them for anything. The first time I cut myself a little, as I was used to the pressure of other shaving machines, but once I found my grip, my hand goes on its own and I enjoy shaving with these blades. No more cuts or irritation on my neck, and the result is impressive. Smooth and soft skin like that of a little child. I no longer use aftershave, just a moisturizing cream, and the feeling is incredible.

Shaving with these is a pleasure, especially when combined with the Feathersafery razor machine since I am new to the field.

Satisfied but I can't say that I have any particular previous experience. Good result for 2-3 shaves.

Very sharp blade, one of the best I have purchased. It is expected from a company like KAI to produce such quality blades!

Very good blade, cuts like butter and even the toughest beards. It doesn't cause irritations and overall makes shaving easy and enjoyable. It requires attention as if it touches the skin in the wrong way, it will show its teeth... The only negative is the price and the lifespan. I expected it, due to being very sharp and high-quality, to last more than 3 shaves but the fourth shave is not as pleasant as the first ones.

So far, the best blades I have tried. In combination with the Rockwell 2c, it cut through my tough beard like butter without causing any irritation. I don't think a better blade than this can be found. It rightfully has such a reputation.