I have just switched from Gatco to Lansky. The Gatco clamp is made of plastic. The joint where the clamp meets the upright piece, the one with the angle slots in it is poorly designed. When you apply pressure upon your edge with the grinding sticks this joint flexes considerably causing you angles to fluxtuate. Over time this poorly designed joint made of glued plastic simply breaks. I went thru two before I upgraded to the lansky system. The lansky system is made of metal and is designed with two opposing of L shaped brackets that have no joint and do not flex. It keeps your blade secure and your angles constant. Lansky also offers well made mounts and clamps for there system which greatly increases its usability and frees up your other hand. Also the lansky system is the best value for right around 35$$. The lansky company is accessable through the web or phone as well as being very helpfull where as Gatco is impossible to contact being owned thru subsidiaries. As far as being limited to certain angles I consider that a good thing. With a system like the Sharpmaker you are reliant upon you keeping the blade completely constant and perpendicular through out your stroke to mantain a perfect angle. Who can do that without fail? Most of us know that a variation of just a few degrees can effect the development of a burr. The lansky system eliminates this possibility by keeping the angle at which the stone grinds the edge constant, resulting in a perfect edge every time. Good luck, Nacci.