After reading many reviews about greenhouses, I decided to purchase this model(4X6). I started in my garage building the foundation and once the walls went up, I moved it to its more permanent location. I spray painted the roof panels white (the south Florida sun can get pretty brutal). The enire construction process took approximately 6 hours (2 persons). I thought the picture instructons were easily to follow. No missing parts or hardware. I purchased the automatic vent opener(make sure you follow the instructions--30 mins in the fridge prior to installing).  I also installed indoor/outdoor carpet as weed barrier. I love it!!! It is exactly what I wanted.