Looks super nice. Cycling has become a dentist sport, the margins on many of the components are insane. The pictures on your link look like very well machined aluminium. Most likely, the real ones are made in china. You take a block of metal, launch a well calibrated CNC machine with the right drill bit and voila. It's not rocket science. The question is more whether what you receive looks like the pictures, i'd say. If i were in the market for such a crank, i'd get it, looks awesome.
I concur on most parts probably being made in china anyways. Take this interview with one of the guys at Ritchey
(minute 7ish) 20-30 people in the company are located in china for manufacturing and there are less than a dozen people in north america and europe. The trick (at least as I found to be the case working in several businesses that dealt with creating chinese components and end products for sale) to getting quality out of China is being there and being strict with QA. Its a whole truck load of worms to unwrap in overseas manufacturing and this isn't really the place for that discussion.
edit, link doesn't show up for me, go here; Youtube Channel "The Bike Sauce", Video title; Why Ritchey Steel Frames Ride So SMOOTH!