It seems to be an incredible design! Complete integration yields a single construction 2x crank with the Quarq PM only adding 36 grams.
I’ve been using Quarq (pre-D Zero) for 4 years. It is fantastic (significantly better than the SRM, particularly on customer service, that I had previously). Was ready to purchase the Tarmac S-Works with Shimano Di2. After this announcement (and lots of subsequent research and phone calls to LBS), I’m going to test the AXS version.
The gearing design is fantastic - 13 teeth between chain rings vs 16 for Shimano; smaller step ups in low gears; broader gear range. Too early to tell, but AXS could be a game changer!