The directions were easy to follow.
The metal tubing and plastic joints are much sturdier than other brands we've tried.
The cover went on easily and fit securely. 
The plastic covering is reinforced with netting and much stronger than other models.
We gave this product 4 stars only because the wire anchors did not work for us due to our very rocky/clay soil so we anchored the rope to big bricks with holes in them, placing them right up against the greenhouse and it seems very sturdy.
The side vents are a great addition for air flow and further protection against wind damage.
We are very happy with this product and are looking forward to the upcoming growing season with much anticipation and delight.  Thank you!