So that was a ft of wet snow. He has a long tricky driveway and he "had to push the snow" down the driveway first because there is no place to put it near the house". Even so he got one side done before he had to recharge.
His judgment, "for a normal driveway, perfect" which is basically what I have been saying all along.
To that I will add zero maintenance. I put the batteries in and press start. No oil to check, and no gas to fill, no worrying about old gas sitting in your blower for 10 months. No fumes to breath in as you clear the snow and the machine is relatively quiet. It's just a much nicer experience to clear snow.
True, as he said, you won't be clearing your neighbour's driveway. Personally, I wouldn't buy extra batteries for an extra long driveway. If your driveway is too long get a gas blower.