They were originally kits made by C. Davison, but the kit business was sold to Ben Tart several years ago. Neither have ever been known to deal in subpar products, ain't no way they'll not be quality, though I've only messed with their uniform kits, not the leather yet.
As a word of warning, I would highly suggest you already know how to do skilled leatherwork before you attempt it. Only first timer kit they got would probably be the cap pouch kits.