Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Must be very strong to use

Not impressed with this tool. You must be very strong to use, especially if the lawn has overgrown for quite some time at the edge. You must go over many times before the blades finally cut through the sod at a steep angle. I found that my steel shovel worked better on tough areas. The tool only seems to work well if the lawn edge is already in decent shape to begin with. Recommend you try something else.