I am 180 cm tall with average shoulders width and arms length. Since I bought JOEX version of it at the store I knew that my size for top is 4.5 (no additional letters) and I ordered 4.5 and it fits well. The quality is good and corresponds to the expensiveness of the judogi (it is quite expensive though).
Didn’t see any issues with it. Stitches seem to be fine and overall build quality is good.