I have one and I have used 3 or 4 times. I don't think it has the structural integrity of the other protable shacks, but it works for me. If you have any wind, YES, tie it down. It will take off on you. I used mine this past Sunday. There was very steady wind, I'd guess at least 15mph, with gusts that were at least 30mph maybe more. I was very pleased with how well it worked with the tie down.