Henry Wolford says:

Awesome design, easy to assemble, works well We live in West Texas. We do get several days in the winter of zero degree weather and several weeks of freezing temperatures. Last year we lost most of our plants to an abnormally cold winter. We were faced with putting up plastic to section off part of our patio or buy a small greenhouse. We bought this one. Having just been through our first freeze, I can tell you this thing works. The outside temperature overnight and when I checked was 29 degrees. Inside the greenhouse the temperature was 42. It was easy to assemble if you take your time and follow the instructions. We folded the flaps at the bottom under and used bricks to help hold it down. The unit is next to our house which helps protect it somewhat from the wind, but last night we had 30 mph and it did not go anywhere. Here are some answers I could not find in my research. There are four, large, velcro rollup windows with screening underneath them. Two are on each side. There is a very large, zippered rollup door on each end. I anticipate the zippers to be the weakest part of the construction over time, so I recommend being careful and slow when opening or closing the zippers. It stands on six posts (legs) which have a flange at the bottom for bolting to something or to help tie it down on ground. Each side’s legs are connected, but there are no cross ties at the bottom. It uses maybe 30 elastic (bungie cord) straps to tension the entire cover top to bottom. They work well once you figure out how to use them. The tubular steel frame is powder coated paint for durability. here’s one last tip. I was looking for some supplemental heat for the colder days. Some suggested a light bulb. Good idea, but I didn’t want a lighted lawn ornament. Space heaters were suggested, but I didn’t like the idea of very hot sources in a plastic house. I did find a product designed for reptile cages called Repti-Heat-Cable. It is a plastic cord, 23 feet long that puts out 50 watts. Since that is spread across the cable length, no spot gets very hot, so I don’t need to worry about burning the plants. It is designed to be running for long periods of time in a lizard tank. I draped the cables around the greenhouse and it seems to work fine.Update December 2013: We’ve been taking this down and storing it during late-Spring, Summer, and Fall. This is the third year we have pulled it out to set-up for the winter. Everything is holding up very well. Nothing has broken and the zippers have not failed. When comparing the cost per year of the unit versus replacing frozen plants, it has turned out to be a good deal.