I have many GreenWorks tools. Two chain saws, two lawn mowers, and two string trimmers. These are used at my house and my warehouse in another town. Most are the 80V tools, the home lawnmower is the 60V model. At 62 years of age, I know a little something about the evolution of tools.
All of the corded lawn mowers I have owned in the past kept breaking on tough weeds or when I hit something like a rock. The battery-powered Greenworks lawnmower stops if I hit something solid, like a pipe sticking out of the ground. You just back up and restart it.
I used to rent a bushhog once a year to tackle the heavy weeds at my warehouse. Now I just use my 80V GreenWorks lawnmower. It can tackle the jobs that no other lawn mower can handle. I can pop a wheely with my lawn mower and attack 3/4" saplings. I have to go slow to do this, but if the motor stops, it easily restarts. No more bush hog rentals.
My Greenworks lawnmower senses the power needed and runs slower for normal grass, but runs faster for the denser grass. At my warehouse I regularly cut 3-4 foot tall grass and weeds. Sometimes I bag that tall grass if I am not trying to grow grass in that area. The GreenWorks 80V has never let me down.
Of all the lawn mowers I have used over the past 50 years, the Greenworks 80V is the best. The Greenworks 60V I have at home seems to be just as good, but I have only cut regular grass with it. My wife uses it too, and her girlfriend got her husband to buy one.
The Greenworks 60V and 80V tools are the same as the Kobalt tools sold at Lowes. The only difference is the kerfs on the side of the batteries making them incompatible, which can be accommodated if you have access to a table saw.