Two years ago I bought two pairs of shorts with the PI 3D chamois. In my opinion the chamois is a little too thick. One pair seemed to compress after a while and is now one of my favorite pair for longer rides, the other one though, the chamois bunched up, got creased and became so uncomfortable I chucked them.
My absolute favorite pair though is the the Louis Garneou Neo Power shorts I bought last summer. Super comfy chamois! Nice waist band, doesn't cut into me. I will say though that they do fit a little snugger than my other shorts, which makes them a little tougher to get on. But once on, they fit like a glove, perfect.
I'll be buying another pair this year for sure.