Works great and now my sidewalks and driveway look great.  I had a massive amount of overgrowth over the edge of my driveway and the sidewalk in front of my house.  This worked like a charm and cut through everything with ease.  I would advise to use a higher setting and progressively bring the depth down if you haven't edged in awhile. If you start too deep, it will just tears things up without cutting through it.  Starting higher will give you a much better defined and better looking edge. I wasn't able to use the lowest setting due to the way the cement was poured, as there is an edge that sticks out from under where the form boards were, but not an issue for me.