This product is exactly as advertised. It is lightweight and provides shade, but not protection from rain (as described). I spent another $120 on materials and hardware to install it because my deck extends away from the west side of my house. To get max shade required installing two 8-foot posts at the far corners of the deck and anchoring the third point to the house.
If you plan to keep this up for long periods, invest in quality metal turnbuckles and hardware that will stand up to intense sun, wind, or rain.