I have one and I love it. It won't work for big guys but it will allow you to hunt and make shots from trees that are impractical for climbers.

Here's my review from the first year:
http://www.huntingnet.com/forum/tm.aspx?m=2112484&mpage=1

I can't find my review from the second year but here's anotherguy's:
http://www.huntingnet.com/forum/tm.aspx?m=2445352&mpage=1&key=tree%2csaddl e&#2445607