This is my third season hunting from a ground blind, I have taken 3 deer from mine so far this year. I set it up in the open at the begining of the season and have had deer walk within stabbing distance of it while I was inside. I take a book, mp3 player, lunch, blanket,you name it and sit comfortable, in a nice chair all day. I've had young deer try to all but stick there head inside of it trying to see what's in it but they never see me. Needless to say I don't sit in my tree stand much anymore.
If you get one I would recommend the one I have. I got if from sportsmans guide for about $80 and it litterally sets up in less than a minute and comes with a nice back pack carry case that buckles across your chest, and you can still shoot your bow while carrying it.
I would also practice shooting from it to find out what is comfortable for you. I'm pretty tall so I can't just stand up and shoot from mine, I have to either bend at the knees and shoot or as I have done this year, I lay a board across the arms of my chair then sit on that and shoot (by the way I do alot of moving around while the deer are present, and I've never been busted). The best thing about blinds is YOU CAN'T FALL OUT OF THEM!!
Hope this was helpfull.