and what are the dimensions of your backyard?They work fairly well. I've been using one on my back yard for 16 years now and love it. Don't let the grass get too long and you're good. The cut is much smoother than a rotary gas mower and it'll even cut when the grass is a little damp. It's like I have a little golf course behind my house, but without the pretentious jackasses chasing their balls.^I think I'd rather get a goat.