Bought from Mercari, previous owner bought in directly upon release. It's a beautiful set and I couldn't find any flaws except that the print is very light, but idk if it's due to age or intended this way. Especially the waistties of the jsk seem a bit faded compared to the print on the skirt (see pictures).
I have only tried them on and washed them, the socks are NWOT

Sophie jsk:
https://lolibrary.org/items/btssb-usakumya-chan-is-petit-patissier-sophie-jsk
Ribbon Ribbon Pâtissier blouse:
https://lolibrary.org/items/btssb-ribbon-ribbon-patissier-blouse
Ribbon Headbow:
https://lolibrary.org/items/btssb-usakumya-chan-is-petit-patissier-ribbon-head-bow
Pâtissier Otks:
https://lolibrary.org/items/btssb-usakumya-chan-is-petit-patissier-otks