My new greenhouse is absolutely perfect!  It was not too difficult to assemble and it looks great.  I did however purchase the automatic window about a month later as it did get really hot in there without ventilation.  So now when it reaches 80 degrees inside up goes the window.  My plants have done extremely well over the Winter and I am ready to move them out so I can use my table to start some seeds.  I would buy this green house again!