The best part about the lens I have is that Kevin had the infinity lock shimmed in the open position. I personally hate the infinity locks on all my lenses and have removed them. The one on the 50/1.2 is different and looks harder to dismantle, so I was glad that it was done for me.
I guess after having been CLA'd by DAG, the focus ring on my lens is amazingly smooth and effortless to turn.
I'll admit the original hood looks cool, but I can't justify buying one since I don't plan on using it. The lens is big enough, but to mount a hood that is as big as the lens is too much for me. I like being in stealth mode...that hood makes it look like you're aiming a small wind instrument at your subject. But Kevin did include a screw-in, non-vented B+W 55mm hood. Looks nicely made, but again, I don't use hoods unless they are built into the lens. I'm not sure how flare prone this lens is to necessitate the use of a hood all the time.