I have only done a couple rides on the bike so far, mostly around the roads near my house. This includes riding both on rough back roads and on smooth, freshly paved roads through an industrial park with several crit-style sharp, high-speed corners. For reference, frames on which I have previously spent a considerable amount of time on similar roads include an aluminum Felt F75, Cervelo S2, Scott CR1, Cannondale Six13, a Lynskey built titanium frame, and Planet X SL Pro Carbon.
So far I am very happy with the bike; the fit is good (to be expected from a custom geometry frame, although I might need to go a 130mm stem or a longer reach handlebar, but I will give it a couple weeks and see how this works out), the stiffness is good (no chain rub when out of the saddle even in my 53x12), the bike corners confidently and feels stable when riding no-handed, and the comfort over rough roads was not bad. With the same wheels / tires (Campy Zonda with Hutchinson Fusion 2 tubeless tires) at the same pressure (100 psi), it transmits high-frequency vibrations a bit more than my Planet X and titanium frames, but it still absorbs large bumps fairly well. In this regard, I would say the frame most closely resembles my old Cannondale Six13 (which I have since handed down to my brother) in its combination of stiffness and comfort. With the Mavic Cosmic Carbone SL / Veloflex Carbon combination at 100 psi, it does ride quite a bit harsher. With that said, I think tubeless or tubular tires (my tubular wheels are sitting at the post office to be picked up) will compliment this frame much better.
I will try to expand on this review as I put a few more miles on the frame, especially after doing a little bit of climbing and descending to see how it performs in those situations. But right now I will leave it by saying that nothing beats a good-fitting bike.
And here is a shot with the silver Chris King spacers and Thomson seatpost collar fitted:
Next up are the Ambrosio Nemesis / DA wheels, and the titanium bottle cages. After that, I think I will leave it alone and enjoy the ride for a while.