I bought this edger to replace a string trimmer/edger and to speed up the time spent finishing up the lawn. I use the 2AH 80V battery that came with my Greenworks mower and it has plenty of power to complete the job, not using up even one battery life indicator per job. I'm still in the process of digging out a new edge in clay soil, so the edger sort of catches in the clay and propels the unit forward a little bit. If you are creating a fresh edge instead of maintaining an existing one, I recommend wearing long pants to shield your legs from debris.
After receiving the edger, the assembly was simple and easy. Using the edger is as simple as inserting the battery and turning it on. Very happy with the purchase.
The edger is powerful and easy to use. It does the job more easily then my 4 stroke did. A little heavy but well balanced in use. Seems to be sturdy and well made with no problems so far. When I finished edging ( about 15 minutes ) I charged the battery for blower use and it was still at 2 green lights. I have had the battery and blower a couple years. I will probably go for the 40V string trimmer because of the weight of the 80v, the trimmer will be easier to swing around that way, but the 80v edger is the way to go.