I had one too many years ago. I agree it is not very comfortable and not as strong as an AK underfolder but not a weak stock either. They used to sell for pretty good money but I have not looked at them in a long time.
The 1st and only Mini I own, I bought because it was in one of them.... very cool stock, I think. But, definitely NOT easy on the shoulder, and a very poor "cheekweld"...