I have been reading about a great product--anyone use this?

[Rustywreck]

Looks like an ok idea, but not for me. I spend hours in the stand and need to stand up once in awhile (actually I spend most of my time standing and sit to take a break.
Another thing, how do you deal with leg cramps? I get them kinda often when its cold out and need to stand to stretch.
I would like to see how your supposed to get up the tree. The nice thing about it is that it looks very light and easy to pack in and out.
I'd like to give one a try sometime, just to see what its like.