I ordered the greenhouse as a flatpack to erect on site - very well engineered and a stable construction- however the instruction booklet needs to be re4viewed as a priority - It is purely a pictorial document, of numbers, diagrams and photos ( not very clear) I understand a multi language instruction, but not clear in many aspects. I am a retired mechanical engineer and I had help from an experienced builder. perhaps some written instrutions for parts of the assembly would I think be helpful. Certainly CLEAR DIAGRAMS , not photos of the top hanging of louver vents, handle position, bottom door plastic slides, a few more self tap screws, and nuts and bolts would save the grovelling !! I hope this helpful- VERY GOOD PRODUCT AT A FAIR PRICE