Also the comments on this forum are very telling. Once you've read a few ten's of posts about any given piece of kit, you start to pick up a sort of generic "vibe" about it. I guess the sample size reaches enough critical mass to have some credibility and they tend to go in 1 of three broad directions as far as I can make out. They're either more or less split on opinion, more or less positive or more or less negative. The prevailing opinions are a real indicator of what people think and sure, within that broad church of opinion there will be some justifying their purchase and some with an axe to grind so moving in the opposite direction. But I believe that, though anecdotal, once the opinion count has got high enough, the data is useful because it's basically honest and basically free from commercial bias.
When reading the Sorby PE threads, much like any recent innovation, it kind of gets the thumbs up or down. This is even more pronounced when the kit is perceived as expensive, because it stands out and it demands to be justified....so it had better dam well work! Rather like Festool.
My personal opinion is that the PE is creating a positive vibe and that that opinion is independently verified every time a new one gets reported here. Eventually, those opinions form an avalanche of opinion until it passes as accepted "truth".