Simple to use, simple to assemble. Instead of laying them on the floor right side up and trying to assemble, I put together from the backside by fitting the loops over the clips by forming a 'V' then straightening the panels out. To unlock, quickly bring the 2 outer edges together into a 'V' again and the panel pops apart. Only problem I have is there was only 49 panels instead of the 50. Seller replied quickly and solved missing piece problem. Tiles are great for basement placement allowing airflow and water underneath.