I bought this as I have a large yard & as a nostalgic reminder of one my dad had years ago.  It's built like a tank & will go up & over most obstacles, through muddy puddles & works great as long as you use the recommended hose diameter & adequate water pressure.  If you don't, the unit will derail around curves.  Not recommended for small yards.  It's well made out of cast metal, so it's not a lightweight (which is a good thing 'cause it doesn't blow over in a wind).