I've had a Sit & Climb for 3 years and like it alot. Steve O, that net seat looks handy for its 'see through' feature...would make it easier to see your feet and set the base into the tree when climbing. But $20+ for a little piece of netting is pricey so will have to think about a DIY version. Being able to remove the rail to free up shooting room would also be nice, but that rail sure does work well for easy climbing.
My only complaint about this stand is the stabilizer straps are flimsy...the plastic 'buckles' on mine both cracked after a short time. I now use a heavy bungie cord for 'hooking' the top and bottom sections together after reaching final height. It's not as tight or convenient to use as the straps were (need to bend over to hook them) but at least its reliable.
Have never had a problem with the heavier lower section loosening or dropping...its the superlight upper section that tends to loosen unless tension is kept.
The stand is so quiet that on several occasions I've had deer within 60 yards of my tree, while climbing, without spooking them. Try that with a tube stand.