They were realy nice and they did do a good job because I was the daughter of my father.
Another advantage: expertise at your disposal.
When I was a little girl, my hair was very, very thin. It mostly looked messy because it had no volume. My mother or my sister would tie it together but they had to tie the ribbon a gazillion times around the hair before it would stick.
In dispair, my mother asked the director of that hairdresser school for advice. He gave my mother tips on two methods with which you can strengthen and thicken hair.
Following one method, I slowly went from very straight hair with zero volume to almost curly hair with a lot of volume.
Now, hairdressers have to decrease the volume because it's too much and they are mostly stunned when I tell them that my hair had no volume at all when I was little. (most people take the reverse trip with their hair: volume in childhood, thinner hair later on).