I have nothing to compare this product to other than an angle grinder. After much research found this product to go with being it’s made in USA and easily able to order parts. Still trying to dial it in to get the sharpness and angle for mulching blades. So far very pleased and can easily sharpen 5 sets of blades in about 10-15 minutes. With an angle grinder would spend almost 15-30 minutes per set and still not get to where I think blades should be sharpened to. Only had this and used for 2 weeks now and sharpened 10 sets of blades.