Got my silent blacks today. I have yet to try them on a board but they feel quite promising as they are. Definitely smoother than stock old blacks. That dark grey stem is a nice touch I didn't expect.
The only two areas I think could be improved in the future are the quantity and the tracking.
My package had a German label over the original Taiwanese one. The tracking number I got from the website never worked, however the one on the German label would have worked, had I gotten it. I live in Europe and this was delivered by my regular mailman (not DHL) with signature on delivery.
Thanks for the GB!