I would love to give this 5 stars just for the idea of being able to enjoy the outdoors in various conditions, since it has adjustable canopy and shades. BUT, there were several issues with this product. 
1. A critical part (M) for stability arrived damaged and had to be modified to make work. 
2. An entire bag of screws (J) was missing to secure the side shades, so I will have to purchase those to take advantage of a major benefit of this pergola.
3. Speaking of side shades, they both fell apart. The shades fell out of the structure and will have to be modified to be able to operate, prior to attaching to the pergola. Again, a major reason for buying this pergola. 
4. One of the 2 piece rods (H) that are a part of the canopy construction was missing.
  A side note, this took more than 5 hours to construct, not just 2 as suggested in the materials.