The adjustable bollard, if that can't be replaced I feel like they will get worn thru causing someone to need a whole new one. Maybe that isn't true I guess time will tell. As a person while loves the innovation in our tools, this is a neat advanment in thus style tool.
As a person who admires the innovators and has been following the wrench it its creator for a long time, im partial to the Singing Tree versions. And much like when David Driver began working with sherrill and notch, I'll trust the singing tree influence on the product notch makes.