The instructions show how to assemble the boxes step by step. Bigger is not better, just more uncomfortable! Top Schuh, sehr gut verarbeitet, hervorragend gefedert und mit guter Stützfunktion. One of the speakers had a slight hum from the beginning. Its not a big deal, and I know if they clamped more, theyd be less comfortable, but engineering could work this problem out for a better compromise. Plus it comes with precut shelf covers so its easy to pull everything out wipe clean and reassemble. I usually wear this during the week at work (10 +/- hours) to help with posture and of course for waist training. However, we are talking of a sensible price here - though still not exactly cheap. arch support is adequate for me and I like the design Work fantastic