I am not good with edging the lawn with a string trimmer so I bought this unit. It was like the one I used 40 or 50 years ago which did a good job. This one is even better. The old blades were just straight flat pieces of metal. This one seems to have teeth and the motor is more powerful. Your edges get better after you have edged them a few times. It is easy to use and has some adjustments for depth which I am still learning to use to best advantage. I am looking forward to next Spring when the grass is actually growing faster but so far I am quite pleased. Moist dirt will stick to the plastic wheels quite easily but is not hard to clean off after each use.