Not recommended on thick facial hair; worth trying for a new blade
Very good shave, but constant irritation and pulling, not always smooth
Inexpensive but still not worth the price of admission...at least for me.
I tried these blades (full disclosure, I received 12 of them free with two of my razors and in a sample pack) in a Parker 65 a Parker 24 and in an Ikon slant. They work OK for 2-3 shaves but even when new they felt "scratchy" and rough on my face. The shave with a 3 pass with touch up was barely DFS on day #1 and by the 3rd shave was only a CCS. I tried 3 blades and will be giving the rest away. I'm know that some folks find these to be excellent but as the saying goes YMMV. Even if they gave me a close shave, I suppose I've been spoiled by other blades that just feel so much smoother on my face. I guess I would sum this review up by saying they felt and shave like a disposable razor...OK in a pinch, but not if I could avoid them.
Appropriately named: Shark--they take a bite out of your skin!
Why bother with an inferior blade? That is the question I have asked myself. I have experimented the last year with different blades because I like to see what is out there, get new packages in the mail, etc. I received these free with the purchase of a Parker 99R. I gave these a fair shot in 2-3 different razors and they just left me bleeding in different spots every time. Life is short, use quality stuff while you can.
They work, but
I was expecting more for my first DEMshave ever. What I got was mediocre at best, scruffy at the worst. I've tried many methods and modes of shaving over my 40+ years (cartridge, electric, multi-blade) and many have given me closer and more comfortable shaves. I would call these blades utilitarian if anything, not superlative by any means.
I thought this was a good blade. I have a heavy beard and had not shaved for 48 hours and the shave was smooth. No burn, no pull. I think a lot of negatives about blades have to do more to do with pre-shave prep and lather rather than the blade itself. I also use an adjustable Fat Boy which may make a difference as well.