Bought this thing about one month ago.   Assembly instructions were very good, and all pieces were very well marked.    Two people minimum required at times to assemble and took about 60 manhours to complete.   I have the fan hooked up to the high temperature control and added another temperature controller to bring on a heat lamp if temp drops below 60 degrees f.   Plants are loving it.   Wish the window had a screen to keep birds nd wasp out.