I have tried one of their folders, and from what I have heard, my experience was on par with many others.
The finish was poor, it had a lot of sharp edges where there should not have been, bolsters, back of the blade, etc. The grind was inconsistent and on some parts of the blade, incomplete. Both of these things were fixable and resulted in a very nice looking knife, ultimately I found the heat treat to be so poor, I was having to resharpen the blade frequently, I could not even get a week of good use out of it.
If you want that style and American made, I would suggest looking for a used Sharpfinger online and at flea markets.
If you don't mind it being made elsewhere, I would look at the Condor version, I have had a couple of their knives and been happy. I would stay away from the modern Sharpfingers, the handles are hollow, molded acrylic plastic, not solid delrin like they used to be (and still claim to be) and the sheaths are very low quality.