Reporting back after putting up the greenhouse:
The supports are a mix of plastic and metal. The plastic seems pretty flimsy.
But the metal parts seem very sturdy.
The plastic cover is very thick. Not actually green but has a green grid over clear.
I'm assuming it's for strength?
It came with tie downs, just some cord and stakes you attach to the top which has loops. The shelves for it are also very light. Seem like they would bend a little too easily.
I did also buy the rain/garden boots and those are working awesome so far.
The organic starting mix was full of chunks of wood. Do not recommend that unless you want a coarser mix .