The components arrived in two well-packed vinyl  containers with only minimal bending of a few edges.  The instructions were all in picture format and easy to follow, for the most part.  There are large gaps around each of the polycarbonate panels, and I went through 6 tubes of silicone sealing all of the edges as well as some rather large gaps in the corner and ride framing.  There is still a water leak at the rear peak that I need to further investigate, but this is a perfect little greenhouse for our purpose.  We built a foundation of pressure treated 2 x 4's and 3/4in plywood and have it anchored with 18in auger stakes at the corners.  There are abundant screw holes in the bottom edge of the frame which allow a very secure attachment to the foundation (this seam is also sealed with silicone).

Pros: perfect size, lightweight, very presentable (rather than the frame and plastic sheeting types)
Cons: large gaps around panels and at frame connections (corners and ridgeline)