The expensive lawn mower ($470 with warrantee) we bought stopped working the sixth time we tried using it. It simply wouldn't start.
I'm not sure if it was the starter, sparks, or whatnot.
We returned it to Lowes (it has a 3 year extended warrantee) and they gave us a new one, which really impressed me.
The lawn mower is fairly big and heavy - a self-powered push type.
I was disappointed that they don't come to you and pick it up.
Nonetheless, I was suprised about their cooperation.
Have a wonderful day,