Great video, Nick. Super detail, but that harness is WAAYY too complicated for me - at least as a rec. climber.
I had a technical rescue harness (very similar design) with double adjustable waist belts and adjustable leg loops. It made me crazy. The straps were constantly coming loose and had to be readjusted. Parachute buckles are not meant to be loaded and unloaded.
One of the biggest problems with that unit, as well, were all of the loose tails hanging all over the place once the straps were pulled snug. They were a lot longer than the tree flex's straps though. I made replacement, 1/2 inch, rubber keeper loops by cutting a mountain bike inner-tube cross-wise and slipping them over the harness belt. I had to do this because the black woven-type elastic keepers sewn on the harness failed after only a few weeks of use. (That type of elastic is only good fer keepin' yer sweatpants up, and even then it has to be aided by a drawstring!) The inner tube elastic held better because it was tighter and stickier than the original stuff. Velcro was an option for mee too, but I thought about how it reacts with fleece clothing and burdock and the like

.
Give me a New Tribe anything, any day. Gotta love simplicity.