I love the product, but assembly is ridiculous and so difficult it makes one wonder why they didn't do a better job. Instructions are pictures only bad choice. Parts are often extremely difficult to get to fit together. Even on level ground, the house slides around refusing to stay plumb and square, it would probably be better to stake the bottom of the frame to the ground before building the rest you might have a chance to get the remaining pieces to fit. To date I still have NOT finished putting it together as It's a struggle to get the panels to fit. It's a well made product but installation design is NOT.
Although the "snap" part was not as easy as it is made out to be, the greenhouse actually did go together fairly easily, and only a couple of tricky areas required my husband's assistance. The directions are all just diagrams whereas I would have preferred words. It took me about two full days to put this together. When you put yours together, don't slide the bottom gadgets into the upright support struts completely as you'll need to level and maybe move things around for the panels to fit. And support struts need to be centered over any joins.
After less than a year, It completely broke. This unit is not sturdy enough for our weather here in Southern California. Flimsy and not worth the price. You can get the same unit for less than half the price at your local ****** ******* *****.