I have two big wall harnesses that I modified for tree work (both Petzl Caladris) because even with the mods, they're lighter than anything else I have tried. I work mostly alone or with only one helper so it works for me, I'm rarely in the tree for very long in a single stretch. Of course, if I'm going to be on gaffs, I don't use them because they get uncomfortable pretty quick, and they won't really handle the weight of a big saw well. But for quick trips, setting anchors, scrambling around to make a few cuts then back down to clean it up, or in a bucket... I love 'em. They're set up for different purposes, depending on what I'm doing, and with the mods the two of them cost less than any tree harness that is lightweight.