As Ron mentioned earlier, I picked up a file from him a couple weeks ago. I've done seven Griz 190's, some Snuffers, and some Woodsmans on it so far without any problems at all. These are not Nicholson's but they are every bit as effective. They cut clean with either light or heavy pressure and leave a pile of fine metal dust behind. I cannot completely attest to the durability yet compared to the (USA made) Nicholson simply because I haven't had it long enough.
Don't overlook these files if you're a three blade shooter. A few strokes to your Snuffer will remove the factory grind effortlessly and save the teeth on your Grobet. Want to make that "precision ground" advertising on your Woodsmans ring true? Run them on this file first.
I know from meeting and talking with Ron, he's only satisfied with providing the best products available, so give him a call and pick one up.