We got a Sunbeam electric mower when I was about 10 or so. My dad's uncle had bought it, but then decided he would hire someone to mow for them, so he gave it to us.
I think I only cut the extension cord once. The cord didn't really get in the way, as the handle pivoted. When I got to one end of the yard, I pulled the handle back and continued mowing. I would start out nearest the outlet, and work my way across to the other side of the yard.
I usually only did the front yard with it, but sometimes the back. It worked well for about 4 or 5 years, until the motor burned out while mowing the back yard. We had a shed about 75' from the house, that had electric, and it was plugged in there. I think the wiring was too small, and there was a lot of voltage drop, causing the motor to overheat.