I've used the ez up brand and they are far superior to the cheap ones. They still will bend up if you don't take care of it or it gets caught in high winds and gets thrown around. You can get a screen or solid wrap to go around them too. Most times they are more trouble than its worth to set up for hvac work but great for a kitchen area when camping. I have one at the shop but haven't used it and have had it for a few years, we did use it to cover tge deep fryer a couple thanksgivings ago to fry turkeys in the rain.