They are the straight razor of the lawn maintenance world!
http://g-ecx.images-amazon.com/image...a273c010.L.jpg
I just got one to tend my in-laws new place. They have a small yard, so a push mower seemed like a good idea. No gas, no ear splitting noise, very little maintenance.
I must say, the sounds of the blades swirling away as you push it around the yard is quite relaxing on a nice summer day.
Grass aint nothin' but green whiskers for your lawn, get out there and get your yard BBS, the old fashioned way!:tu