Got it! Had to go get it after fedex sat on it for a week, but it's here now.
Evil did a good job building it up - all I had to do was bolt up the bar and front wheel, which was honestly sort of a bummer, I like building bikes...but I went through it, everything was tight, well asjusted, ready to ride. I put bottle cages, Garmin mount and a new seatbon, through the stock seat is probably just fine.
I'm 6ft, average proportions. I'm on an M with a 70mm stem and 46cm bars and a bunch of spacers under the stem - I asked for a lot, as many as they could, it's probably about 50mm. Fit is great - I could have gone large, but it would have been longer than ideal. I get back pain on bikes that are too stretched out, and I want to mess with wider bars, which only end up feeling longer. Besides bar experiments, I'll probably drop the stem a bit, maybe just flip it.
One ride in, a quick, cold 20 mile rip on shitty road. Its stable, fast, rides smooth on chunky pavement. Some reviews indicated it was a bit harsh; maybe compared to other carbon road bikes, but felt awesome to me, even on 'only' 34c Byways. It snowed the other day, so I was dodging piles of snow at intersections and piddles of water that might be ice at every turn, so conditions basically sucked... Which is consistent in suburban Chicago land, and exactly why I wanted a grarly bike. No real gravel or single track today, because it's all a snow and mud mixture right now.
And...it's not a mountain bike. It's a gravel bike. Doesn't feel like a mountain bike, feels like a crazy capable drop bar bike.
1 ride and 20 miles... Pretty happy with it.