So far so good.  The panels are like a corrugated plastic but what do you expect for a little more than $500 shipped.  The metal parts seem well made for China.  If the manual were bigger (it's like a 6 by 8 inch booklet) it would be easier to see the pictures and you might make fewer mistakes, but hey, you get a metal framed 6 foot by 10 foot greenhouse all the way from China for a good price.  It's still a work in progress but I am pleased.