So this is a lot more sturdy than the other reviews would have you believe, yes it's sheet metal and generally not structural but thats what the side beams and supports are for, take your time with putting it together, and make sure you get an exacto knife to cut the edge of the plastic on both ends of the panel (that will save you a LOT of time peeling it) make sure you have the right panels on top/bottom (theres two different kinds in the box) and that your side beams are right way up (hole on top). This won't stop hurricane winds and you could probably use it in backyard wrestling, but once its together tight its pretty darn sturdy for what it is.

Very flimsy and difficult to assemble with sharp edges. These are bottomless, which was not at all clear from the item description. I am returning them.

The package was delivered damaged. I should have returned it immediately. Instead I built it and I was very disappointed. It is not sturdy and looks off. The material is thin and sharp. Overall this is NOT worth the money. I am so dissatisfied and wish I could return it.