They work very well ironglow as I have used one for the last four years now. Plenty of room inside for your daypack & exta's and I even weathered out a fair thunderstorm in it once!
I like to place my chair on the diagonal in the event of a quartering crosswind as this allows me to see out all for windows. Those windows don't have to be zipped down a whole lot in order to see/shoot.
My ground blind did (just pop-up overnight) during my first late season hunt with it that required traveling...even though I had good background to breakup it's outline I was suprised that a few deer and even some Coyotes passed by without seeing it at all!
My only word of warning to you is to stand back a little when you first set one up cause the spring loaded steel within the fabric will cause the whole thing to jump up and punch you in the jaw when this is done

(been there) Breaking the thing down when the hunt is over requires some finness (on my model) cause you have to collapse it flat which is easy enough to do but then you have to twist it like a figure 8 and then try to rotate the steel back into two circular shapes that fold one on top of the other when done. This definatley takes some finness as said.