This greenhouse is very well constructed!  I am so excited to get started stocking it with plants.  Putting it together was quite an undertaking though.  In fact, I'm only giving it 4 stars (instead of 5) because the instructions were a bit confusing (pictures only with little to no text) and it took me a lot longer to put together than I thought.  But I am very pleased with my purchase and I think it is a top quality product for the price.