1. They're not motorized. I have a >300' long driveway and live on top of a hill with wicked winds that drift snow. April snow is wet & heavy. There's a reason I have a snowplow on the lawn tractor! 2. The edges should be sharper to get under bits of ice. 3. Need varying widths: 2' wide for the path to front door; 3' wide to shovel the driveway. Gets annoying switching shovels. 4. Hard to find at night after a big storm. Should be fluorescent.

Like I said, there's a reason I have a lawn tractor with a plow blade and another with a snowblowing attachment :-)