First PS Stix, been riding mostly BBS and DSM for the past 3 years. The flex is real, they feel like a BBS that's 4 sessions in and they need to be skated differently than a stiffer board, I need to pop lighter to get the springiness. The flex helps 360 flips a lot, I just wish their 8.25s had longer tails, and they measured tip to tip instead of flat across the length.
I'm only 4 sessions in, can't comment on the longevity yet.
Given the choice I'd stick to BBS.
Edit: Looks like my praise was premature, noticed some ply at delaminating at my nose, nothing major, but it's a bummer since my board didn't shoot off into a pole or wall recently.
First board I've had delaminate on me in 20 years