Received my copy (Disc) on Monday and also ordered a set of RC-50 wheels. Complementing it with Rival AXS the assembly was straight forward, but some points one should take care of (if not already mentioned somewhere in this thread).

When you fit a DUB/30mm axle you have to file down a protruding rivet that holds the bottom battery cover. Otherwise, you can't mount the axle straight. Just remove the bottom cover and you can access the rivet. The BSA threads seem to be cut post-mold and co-axial alignment/facing is fine. I had to remove some residuary debris and paint, but then you can screw in the bottom-bracket by hand easily and crank-axle fits smooth. Break mounts seem not to be machined but are sufficiently flat/parallel - no rubbing. What you have to take care of is the thread-insert holding the rear axle. It is fixed with a small screw that may get loose/lost. It can then happen that the insert rotates, and the axle becomes loose. Coming from the factory without it (!) apply thread-lock to the screw and check regularly. Overall quality of the frame seems fine, but time will tell. Test-drive today did not reveal any issues. The frame feels firm and with 28mm/5bar sufficiently comfortable (for a race bike). The handlebar seemed quite flexible when putting power into the bike, but I have no experience with the original, so that might be normal.

Someone having long(er)-term experience?