Is it me or is he sitting too high?
I am sure I can see daylight under between the saddle and his body on the last picture.
I remember the original pics of the sprues you posted up IF, and at the time the componentry looked very interesting and varied, but looking at this finished article, generally the proportions look a bit off to me.
The torso looks too big for the legs? That may be because the model is not mounted on the saddle properly.
Also, and I admit I am not too sure of my ground here - awaits Donnachaidh's opinion - but the horse's head looks a bit thin and small too.
I believe the models will be at the Salute Show in London in a couple of weeks, and they are on my 'list' for closer inspection.
I originally wondered, as they were plastics, as to whether there was a mix and match compatibility with the GW ones.