Customer service: 7/10. The people I spoke to were quite helpful, but when this greenhouse is priced at 999.99, they won't qualify it for the "free shipping over $1000" offer.
Part-Fit (how well did the pieces actually fit together): 6/10. A number of the pieces had to be trimmed in order to fit together, including the ridgepole which was a full inch too long. The opening-windows are also pretty twisted when they are put together (had to retrofit some hook and loop latches to account for this). This score would have been lower except the hardware is actually super high quality: well machined stainless steel nuts and bolts
Quality of instructions: 5/10. Not great pictures, no text, and often the parts do not match their depictions (see the 6/10 part-fit score)
Finished product: 9/10. Despite the difficulties, the built greenhouse looks pretty good!