it was very easy to assemble ( with DRILL BIT)and i find very versitile in doing several exercises, such as benching , abs etc I wore it for a week to try to break it in without the inserts but I cant wear them at all. I purchased the Sand color which is comfortable as well. I really like these water shoes and I would buy again should anything happen to mine. Everything is still up and we have several heavy anoraks on them. The soft ear piece started to fray and I had to use duct tape to keep them on. Al final no es un punto tan negativo, pero viendo lo bien que funciona esta funcionalidad en otros auriculares creo que podría ser mejor. Wore these pretty much daily for 5 hours minimum per day. I now have several pairs of Vionic shoes/sandals. I read the reviews and tried it anyway.