This is only a few rehearsals I use it, but I already won. Precise adjustments very simple. Unlike the foot of charley in the same range, the design is excellent.
Material strength and stability.
The diameter of adjustable seat, is surely what is less well on this stuff, but a cinch. The three support points are rubber buffers, which gives comfort to the body. That happiness.
Despite a high enough price, I think I would do the same if it was folly to be redone.