We followed the instructions for the most part. However, we did add 6 inches in height and the center of the headboard was larger. We completed a tufted upholstered insert that we added. It only took us about three days and we are very please with the results.
Only recommendation: After you sand, fill holes and other dents/dings in the wood use wood putty. Sand again. Prime. After priming, more "flaws" can appear. Take the time do fill again with wood putty and a light sanding. It is hard to do when all you want to do is paint...but the time will be worth it in the long run.