I'm not sure why I ordered this version and not the standard. The PRO version has doubled up nylon at the belay loop attachment point. When I ordered this, I possibly was thinking "Oh, double loops, one each for the lower and upper harness". What I found was that the belay loop tie in has 2 loops of webbing, but they are sewn together halfway up the loop. Also, the inner loop is longer, which makes it sit really odd when I hitch it to the belay loop. I have recently used other PAS, which is why I ordered it, but I'm confused about the product.
Sterling says that its rated to handle three factor 2 falls, however, its only rated at 14kN. If I am sitting atop the anchor on a ledge and fall, shock loading the anchor, I calculate that will generate a force greater than 14kN. (if it were entirely static material, the force would be 22kN).
Also, I'm guessing the doubled belay loop material absorbs more kinetic energy from the fall... but to what extent I don't know. I'm thinking the regular version would do just as well, and would result in less bulk on the belay loop.
Overall, the quality of the PAS is good. The color is nice and bright. The length allows it to stretch around my waist (34") and clip to my front gear loop on the opposite side. The plus of this PAS over others is that it doesnt use spectra/dyneema. Those materials would pop if you took a dynamic fall on them, whereas this material will stretch some. I'm excited to see how I can start using this PAS to clean sport climbs and setup on multi-pitch.