I have had them all at one time or another. Right now, I have a Summit bullet backpacker climbing stand hangin in the shed. It is a good stand that is comfortable to sit in for extended periods. I have a bad disc in the L5 (lower back) and sitting isn't one of my favorite things, but the Summit makes it possable. Same with API climbers ( Grand slam deluxe comes to mind). They are heivier than the LW models but if I can't sit still while on stand, it's useless to me. I also have 4 LW climbing sticks and looking for the alpha fixed stand to match up with them. Will come in handy when a climber won't work. Not so high on the comfort scale, but than again, it's not too bad for hunting 20ft up a tree.
JL