When I hung my cabinets I built a soffit framed with 2x4's and covered it with drywall. The soffit stuck out past where the cabinet would be by about 1 1/2 inches. I had 3 1/2 inches to run two screws up into the 2x4. Then I put 4 more screws into the plastic strip that's embedded in the foam. These cabinets have been hanging there for 12.5 years and some are loaded very heavy and they haven't come off the wall yet. If you don't like a soffit this won't work. Personally I like it better than having a bunch of crap on top of the cabinets that collect dust.