RE: Double Bull versus the others
To me, the answer is.....how much are you going to be using it.
For me, I bowhunt out of treestands and I turkey hunt (gun) behind a tree or in some brush. The only time I ever use a blind is when I'm bowhunting turkeys. So for me...Hell no it isn't worth spending $300 on a blind. I bought a Ameristep for $50 and it works good. The only downfall if that setting it is a big niosier than I would prefer. But if you set it up before-hand or when I use it turkey hunting, I get out to the woods WAY before the birds even start gobbling, then it is fine. I would rather buy some real pimp treestands with the cash and buy a less expensive blind.
Now if you are going to be using it a lot. The I would suggest going with a brand like Double Bull. Because they you will get your moneys worth. So weigh it out. Good Luck