I purchased this in July, 2015.  By November of that year, one of the seams was beginning to come apart, but I could not locate my receipt to use the warranty.  By spring, 2016 the seam was 90% apart and there were many areas beginning to rip at the stress points.  At this point, the shelter is pretty much in tatters and I need to do something before winter.  I hate to replace the cover with another one that will only last a few months, but cannot afford the upgrade to a heavy duty covering.  The frame seems to be in excellent condition, but I may very well end up getting a couple of tarps to put over it for the winter.  I definitely would have purchased something else if I had know of the short life span.