My only complaint is that I wind up doing a lot of shooting with the lower edge of the stock touching my shoulder instead of the whole stock against my shoulder. Otherwise, I have to contort myself to get a good sight picture.
This is because the stock goes straight back instead of down like on traditional rifles. The reason it is designed that way is so the muzzle doesn't rise so much when firing on automatic. Less torgue around your shoulder.
The sights are elevated to make up for this. However, as I got older, I wanted the sights to be higher. Probably because I'm not as flexible as I used to be.
I don't recall having that problem when I was younger.