It's my first Para2, so all I can't compare it to production or other sprints - except a couple I tried in the store.
Action is smooth, lockup is solid, blade play on mine is minimal. I can dial it out by tightening the stop pin, but then it doesn't swing closed without help - and I like being able to do the "Spydie Drop."
Runs as well as I expected from the write-ups and reviews I had read, and doesn't exhibit any of the coarse/sticky lock issues some people have experienced with the production units.
The "2nd click" in the detent bugged me for about 2 days, but now I don't notice it - I think because I built up muscle memory in my thumb, and open it all the way each time now.
I carry it 6 days a week since early January.
I've used it quite a bit on food prep, tape, cardboard, paracord, and small tree limbs, string, and various and sundry other cutting tasks. I've touched up the edge a couple times for the heck of it, but it's never been less than hair-shaving sharp.
I really just love this thing.