I ordered the ER:ONE in XXL with Dura-Ace Di2 components. The ordering process was straightforward. It's possible to customize the seatpost and handlebar width and stem length. It also appears you can choose between a 52/36 or 50/34 crankset and a 170mm or 172.5mm crank arm length. However, this is never actually requested. In my case, it defaulted to 50/34 with a 170mm crank arm length. This isn't the crankset I would have ordered. After all, the frame size is XXL, so I would have expected a 172.5mm crank arm length.
Delivery took approximately two weeks. I received regular updates on the delivery status.
The bike arrived in two separate packages. The first package contained the saddle, seatpost, wheels, tubes and tires (Continental GP 5000 TR), brake rotors, cassette, battery for the Di2 electronic shifting system, and a few small parts.
The second package contained the frameset, which was pre-assembled except for the fork steerer tube being cut short.
Regarding the packaging:
Both cardboard boxes were damaged. The wheel hubs lacked the usual plastic caps. Since the hubs had punctured the cardboard due to the lack of protection, they were (superficially) scratched. Nothing that affects usability, but it's annoying.
The frameset was very well wrapped inside the box, and sensitive components were additionally padded. Everything was complete, no damage.
Regarding the bike:
Fully equipped, it weighs 7400g. That's really good for the frame size. Perfect finish, highly precise workmanship. You can usually see how well a carbon frame is made by looking inside the tubes. There's absolutely nothing to complain about here.
I've ridden the first 1000km and I can say: Wow, this bike feels fast!! I usually ride a Scott Foil on the road and it doesn't feel any better than the QuickPro ER:ONE in any respect!