This is the fourth roof within 3 years that I had ordered. The fourth version is improved so that two shortened loops were sewn to the suspension instead of a longer loop and the roof can be tensioned better, so that the rain water now can no longer collect in large bumps on the edges. The material was not qualitatively improved still and produced for wear. I would gladly pay double the price for a good quality and processing in order to not replace so often need. Since I do not expect in this respect with a positive change on the part of the manufacturer, I'm going to now a roof can make from tarpaulin.