Underpowered and poor quality attachments.
1) attachment A (see photo) - wire/string attachment; I used up 2 (of 10 provided) in less than 5 minutes, on 8 feet (2.6 m) of sidewalk.
2) attachment B - plastic ears; used up 3 more for the rest of the walk; again, too soft for incidental contact with the concrete of the pavement; used up 2 more trying to edge around house, so 5 of 10 provided are gone;
3) attacment C - twin blade edges- 4 provided; I edged along the road sidewalk, and got the job done without even destroying 1 of these; however, due to lack of power, I had to go over several places 2 and 3 times; 80 minutes for 60 feet (19 m) of sidewalk edging.
4) attachment D - saw blade- 2 provided; this is what this tool should be used for, and nothing else; cutting kudzu was a little difficult because of a lack of power, but the blade is durable, and once I put the wheels on (difficult if you don't have your own tools), it really cleaned up the back part of my lot.
Overall, a 2 of 5. My recommendation is to spend more and get more power.