When ordering, keep in mind that this product is NOT a true rectangle! The corners are elongated with rings at each end. Also, unless you really apply tension (or run a line underneath like I did), there will be some sag on the long ends (see last photo).
I was tempted to rate this item a 4 because of it not being a true rectangle, but if you examine the diagrams, they obviously show the elongated ends so just make sure that design works before ordering.
That being said, the product really does keep an area well shaded and seems to be a very well made product. The price is also reasonable compared to other items I've seen.