Just got it in. I am way too busy in the season to sharpen blades with an angle grinder. At 9 bucks to pay to have it sharpened and 18 or per blade to buy, I bought new blades all season instead of sharpening. I've got stacks of blades and just breezed through about a dozen in less than a 1/2 hr. Some were pretty chipped up. The sharpening quality is far better than I can get with a an angle grinder. All I wonder is how long the disc lasts. I've put off buying a dedicated grinder for 2 years. Should've bought it day 1.