Got mine yesterday after waiting weeks! I’m 5’11.7″ slim build 10.5 stone/66kg and it fits PERFECTLY, praise jesus!! It is a short cut compared with a civilian jacket, but no where near as much as my Pissei jacket (which is like a crop-top), and will fit great on the bike. Looks smart and slim cut so will probably not fit a belly in it! :D cosy material, if you go hunting you’ll find some average stitch quality and a couple of loose thread ends but I can accept that for £30.
For layers you will probably be able to fit a long sleeve lycra layer and a thin merino layer if your arms aren’t too thick.
The bum flap thing looks a bit funny, not totally sold on it, I think it would be useful to someone without proper mudguards.
All in all exceptional VFM just need to test in the rain now.
one more thing, the pockets on the back don’t have a thin flap over them like some jackets do so they might fill with the water which runs down the jacket