I think they are great for standard faceplates with sockets built in. However, there are no threads for "Decor" style overlays. There is only one hole on each side above/below the threads of the plug insert. While I'm glad there are at least holes for the bezel screws, I think if they provide holes they could go ahead and thread them. For now I just drive the screws into the faceplate through the holes and straight into the drywall. This works with longer screws, but it means I couldn't use the decorative screws that came with the bezel. However, they are a great invention and I would highly recommend them rather than messing around with installing a standard box or screwing a faceplate straight into the wall. Decorative insert: https://www.amazon.com/gp/product/B001AOY1IM Decorative panel: https://www.amazon.com/gp/product/B000U3I39C