Well, datas guys. I see the utility, the only thing I dislike a little bit (but that can't be changed and that isn't actually a limitation) is that they are focused on Russian people, so Russian traditions and Russian habits. I would apply them in a flexible way on other large populations. On the other hand this can be a good point to start to study intratype differences and how background culture and habits can influence type expression in society. Overall this is good.