I researched over 30 greenhouse kits before selecting the Riverstone Monticello Mojave package. I read over 250 reviews on those researched. I live in SE Missouri and we have ice and occasional heavy snowfall, so I was specifically looking for a sturdy, well-constructed kit. The fact that the Mojave package included many of the needed elements was a huge factor and I was confident in my decision to buy it. That said, my confidence increased once my husband studied the extensive installation/assembly manual and gave it his highest marks. It grew exponenitally once our contractor got the initial structure and he, along with his team, said this kit was the best he'd ever seen. While we have not quite finished - still have the benches, sink, and watering system to go - I wanted to post this review in hopes others would do their own research and discover what we did. This is the best! It took about 2 days to assemble - and it was done carefully, and to spec per the manual. Our crew was meticulous about getting everything right, plumb, level, and sturdy! I cannot wait to update this review with final photos once my plants are in the greenhouse. Kudos to Riverstone and the entire shopgrowspaces.com staff for their outstanding support and response to questions we had along the way. I highly recommend this greenhouse kit!