Out of the box, everything is nicely machined and anodized, but putting a knob on immediately shows some things that could be improved upon. Sure, I'm not using a Billetworkz knob, so that's my problem... Except a minor tweak would take care of this and make this adapter near universal. For reference, the knob used was an OE WRX knob, which I'd have expected to be the most likely of non Billetworkz knobs to work if anything did. Of course, I can't say the product is horrid due to lack of knob compatibility. But again, a minor tweak would prevent the need to be overly cautious when installing a knob. Out of the box, the setscrew was ridiculously tight, and installing a knob showed why. The whole threaded aluminum piece and the setscrew will come off in your knob if not tightened sufficiently, and they're an absolute pain to get back out.
Had the threads been made longer (more akin to the short shifters) and jam nutted for height adjustment, rather than use the big aluminum block used as a coupler nut between the body and a setscrew, shallower lockout recesses would work fine, other knobs would drop right on, and you'd actually gain a bunch of height adjustment along the way. The multi-piece mess lodged inside your knob wouldn't have a chance of happening either.
The lockout ring setup is absolutely nicer than the lift to release configuration used by most others for the DSG application, and as I said, the part is nicely made. Unfortunately, I think the design itself could use a bit of improvement to be as great as it really should be and unfortunately, none of that is really obvious until you've handled one of these in person.
Also, I didn't get the flat lock zip tie mentioned in the install instructions, which prevents a clean install without tracking down a replacement/alternative.