I've used them for face shaving and found them absolutely agreeable, in fact keep in both Cloud and Feather brands. They're for use in the Feather Custom Razor.
... you might still be able to buy the Chinese copy, often sold under the Cloud or Vincent brand:
As you can see, it's a good copy.
The shave is akin to the Weck with the long Personna blades, just a lot more vocal.
The writing has rubbed off on my Feather Custom Razor, but in the right light you can just about see it: