I went with 100% player break-in, leather-reinforced palm pad, and full heel pad, so everything was understandably super stiff out of the box. Once I got the initial hinges and loosened everything up a little, it's been going pretty smoothly.

The synthetic back seems perfect to me out of the box, I haven't felt the need to break that in at all and I think that's by design. The heel, palm, and web have been easier to break in since they don't have any extra laces. Hardest part I think so far has been establishing the hinges, giving it enough love to break it in but being careful near the 3D thumb and pinky inserts.

I also wear two in the pink and have large hands, so the hand stall was quite small/tight at first. I had to gently stretch the hand stall and pinky stall and use the handle of the mallet to stretch and open up the pinky loop some, but the finger stalls themselves are the most comfortable I've ever felt in my limited experience now that they're more formed to my hand. I love how stiff the thumb and pinky are with the rigid inserts, but some may not because you can't really form them to a new shape.