+1 to all the comments about the Summit Viper. I have one (the Viper X4 model) and it is the most incredible, most lightweight but rugged, and most comfortable treestand I have ever had.
I have actually nodded off to sleep more than a few times in it too... [:-]

bhunter50, the Summit XLS (if I remember right) is the steel model and a little heavier than the all aluminum Viper/Goliath/etc... models. But then I think that model has the swing up/overhead camo bar, that can be used as an excellent rifle rest.