It is an obvious knock off, with no set up instructions.That being said there are plenty of videos on how to set up similar ones with manuals available on their web site.Setup really is not that difficult. Install the "T" to the rear, the wider plate to the front, the other two plates to the guard, lower the wheel to get 30-degree angle , then make sure all plates are within 1/8" to 1/4" away front wheel and tightenThere is some vibration, but not enough to concern me.My thought is the grinding wheel is not perfectly balanced as there is no vibration with it removed, (as an aside my bench grinder does the same thing) plus you could always get a different wheel.All in all, it appears this will work fine for the 20 or so blades I sharpen per season.(I'll update this review in the fall of 23, or sooner if issues arise)