I built this a couple years back. Learned a lot, definitely would do things different if I were to do it again but I didn't use corner brackets or cement the posts in. It gets decent wind, a little wobbly when the wind is blowin good. But after a couple years its still standing and works great. Here are a couple pics during the process, don't have any available from when it was done.
I just bought a place and it came with two box stands. They are nice and cozy. I wish they were a little higher but I'm not ready to undertake that project just yet. Still good for my dad to sit in or me and the kids on a cold day.