Wow!  I bought this canopy to give my chickens some shade in the summer and cover from the rain and snow in the winter.  I went up very smoothly and quickly with the help of my daughter, and withstood all elements of nature by securing ties on 4 sides.  The snow had to be popped off from underneath in order to avoid excessive weight, but all remained intact.  
The sun apparently weakened the fabric, however, and the cover developed small tears the following summer which I repaired with 2" tape.  Unfortunately, strong winds and heavy snow this past December were too much for the canopy and it tore to shreads on 2 sides.  As I only got one full year from this product, I'm thinking I can replace it with a 10' x 10' $49.00 canopy each year.  I wish the fabric had been more durable.  Poor chickens.