I was lucky with my non-sound, fictitious black liveried model. It arrived with one whistle missing and the other one loose, but present. All wheels were on properly. All lamp irons were present and well fixed.
One pickup wire from one side off the leading bogie dropped off after a small amount of use, but that was soldered back on (a little bit of a faff to get at it properly).
Mine runs nicely, and all lights work as intended, albeit not as per the prototype.
The livery can't be criticised as it never existed in the first place. The wheels can be criticised as BFB-style could very easily have been researched properly. I have filled the holes in with Glue 'n' Glaze, then painted them black again. That's not a perfect solution but it stops one seeing right through the wheels, a problem that should not have existed at all.
I have removed the resin coal load and added some real coal to mine, and painted the buffer beams red.
Overall, I am happy with my model as it looks like a Leader, but I am also aware it could have been better, and as such I will not pre-order any more KR Models stock until I have seen the model in the flesh (or at least, some reliable reviews in magazines and online). If that means I miss out on one I would want, then so be it. Some other manufacturer will get my money instead.