I own a lot of top-of-the-line frames (BMC, S-Works, Look, etc) and I can say without a doubt that this is the best I've ever ridden. The BB386 bottom bracket is so stiff and no energy feels wasted. I thought my Tarmac SL4 was stiff but this is noticeably stiffer but at the same time it is compliant and nice to ride. If you are thinking about a getting this frame just do it. You will not be sorry.
Also, I want to say thank you to Wes who helped me with selecting the parts and getting it built quickly.