As already mentioned there are tons of different portable blinds on the market today. Many are very good, durable blinds with plenty of room. My opinion is that the "Double Bull" is a very good value in a portable blind .... though if you are going to have to tote is a long ways in/out it is not so portable because of the weight. It is simple to set up and roomy. Mine has been great considering the much use it gets. The model I have is also rain proof, though in a hard drivng torrent it will leak a tad around some of the seams.
You need enough room to move with stealth, and to sit comfortably hour on end. One thing that I have noticed is that many will sort of "pink out" if left out month after month. I guess it is the effect of UV on the cloth dye.
As already mentioned it does not hurt at all to soften up the profile of these "huts" with branches and/or clumps of grass. And I do tie a strip of "hunter orange" at the top of my blind ... just in case some dumb a$$ here in SE Alabama mistakes it for a sleeping elephant!