I have the mats very happy now for almost two years and am. There are no problematic odors or the like. The connectors between two mats fit together properly and are still stable even after two years. The mats are very non-slip, support and coordination exercises are possible due to the pleasantly roughened surface without slipping. By wipeable surface, the mats are very hygienic. Due to the square size is also more mats can be relatively easily stowed. I am going to order two more mats and give away.
