I am using this on top of a 48" x 18" metal wire shelving unit [widely available].  I finished it with to a food-safe cutting board cream and it's working out exactly as I planned. I used brackets on the back side screwed to the wall for stability.  The finish looks nice after a couple of coats with the wood cream.  This comes unfinished, so you'll want to have a plan and your finish ready when you open the package.  A+