I'm a pretty big fan of PI. I own 2 pair of the previous version of the PRO shorts, they are very good. When I bought the first pair I just put them on and rode, no problems ever. The chamois is a bit thick but kind of packs down over time and I've never experienced any sort of discomfort from it. Bought the 2nd pair, same deal. Good.
Thought I'd get another set and decided on the latest and greatest. There are some improvements: better waist band, better chamois. They look great and are made as well as you'd expect them to be.
However, something is wrong with these shorts that forced me to send them back. Either they are cutting them smaller, the new material doesn't give as much, or the new panel pattern is just wrong because I found them to be so restrictive that I fought them the whole ride.
After my ride I had seam imprints in my legs for like an hour. My legs were achy which doesn't happen to me, I ride 3-5 x/week.
I called PI and the guy said maybe I had the wrong size. I don't. He also said they may just feel different with the new material but shouldn't stretch out. They do feel different, and to the point that I won't ever put them on again.
They took the joy out of my ride and I believe that pretty much says it all.