I finished my build end of October and have been able to ride the bike for two months.
I am now able to provide a feedback on the bike.
Build:
Frame with integrated handlebar/stem
Mechanical 105 12 speed (550 euros including disk rotors and bottom brackets)
Elite wheels Edge 50 mm (600 euros)
Tyres and tools including stand: 500 euros
Weight of the bike: 8.05 kg including bottle cages and pedals (250g)
I'm quite happy to have a bike under the 8kg bar, probably thanks to the carbon wheels.
It was easy to built, cable routing through the handlebar was also easy with the proper tool. The only hard part was routing the front derailleur cable through he frame cable stop.
I used to ride a 15-20 years old Gitane weighting 11kg or so so to me the Velobuild is great. I am not able to make a comparison with any modern and high end bike.
Cons:
The finish is not perfect, there are some imperfections in the paint especially around the wheels axe holes where paint is missing and there is a dent on the edge of the carbon headtube cover but it's not misssing paint. I guess it's to be expected for such a low price. Overall, these aesthetic defects are barely visible.
Somehow I can't post a picture, it leads to an error page...