I am surprised that no one has mentioned the Summit Bushmaster. I have the original since I was 14 and have never had any problems. (I am 22 now) I have replaced cables. The hanging seat provides plenty of comfort and the platform is plenty big enough for my size 13 boots. I think of the 5 guys on my lease 4 of us use them. I feel like it is a good stand, finding the middle ground between comfort and weight.
Yes I do have to stand every now and again during the course of a 12 hour sit, but I spend more time standing than sitting anyway. I try to spend 40 min. of every hour standing. Yes it makes for tiring days but it pays off when a deer shows up and your already standing.