Unfortunately I couldn't share it before but we had limited stock of DI2 11 speed in the shop last week. (mentioned by someone else couple of pages back)
I've now build 3 bikes with the new DI2 groupo's and It's just a whole new level. Somehow they managed to improve the performance over the original DI2 10 speeds groups. Front shifting is feels even more "secure" but that could be crank/chainring related as well. Rear shifting is vastly improved and faster, especially the down shifts (heavier gear) feel lighting fast and a real improvement over the old group.
E-tube wiring is a bliss versus the old DI2 wiring but we already knew that.
The new brake cables is wat caught my attention though. (sorry no pic, will post it on Friday) The cables use some kind of polymer coating instead of the brittle PTFE coating that other company's use. It gives the cable a very cool golden weave look and the feeling when braking is just amazing, feels almost compression-less.
I think the brakes are once again a clear improvement over the 7900 ones. The sheer stopping power is almost to much. I might add that I was using Roval red carbon brake pads on the new Roval 60 mm carbon wheels (Not really a fan of Roval wheels but these new ones feel great, good rim, DT 240 internals)
When I first installed the brakes they felt kinda mushy once they grabbed the rim and I thought it was related to the absence of the middle pivoting point. But when I started using them a little a more I realized this is just build in modulation and it works very well.
Sorry for the hasty cellphone pics