I haven't ridden it as much as I'd hoped for various reasons. Everything has been fine. No brake rub, comfortable (for me) and it bowls along very nicely. I would give the frameset a cautious recommendation as lonf as you're prepared to do the necessary fettling to make sure everything goes together nicely.

I registered on this forum because I am about to pull the trigger on a red crystal YFR066 frame, just like yours... And I was wondering if the paint job looks good.
Please do keep us updated!

Yes - the paint job looks good. However, as I said, the caliper mounts were not masked so I have had to remove the paint in those areas. In the absence of a £350 Park Tool that would do the job, I resorted to needle files and Stanley knife blades. My build will have hydraulic brakes but, in order to check that my filing was OK, I mounted a TRP Spyre mechanical caliper with the wheel and rotor in place. By manually adjusting the pad clearance it was possible to make sure that the pads were parallel to the rotor (ie the mounting surface was flat and square). It took me nearly an hour in total to get it right.

My build has stalled slightly as I chose the wrong width/stem length combination for the integrated bar so I've had to order another one- I'd failed to take into account the seatpost setback. I've got a shippping number but who knows when it will arrive with the Chinese New Year looming...

Sorry to sneak into this thread as a +1. I've ordered a YFR066 frameset and integrated bars and have just been told it's been collected by DPD in China. The frameset was ordered on 18th December BTW and communication with Airwolf has been fine. It's going to be a slightly unusual build as I'm speccing the bike for very hilly sportive events (specifically the Fred Whitton Challenge here in the UK). Gearing will be 50/34 11-40, giving a 23" lowest gear. So far I've built the wheels, using Ryet hubs and 38mm rims off Aliexpress (Carbon Beam Store) with Sapim Race spokes - they come in at 1402g for the pair.

If there is interest in yet another YFR066 build, I'll keep the forum posted on how things go.