Over-priced products, whith cheap and harmful ingrédients. Don't get lured by the shop's decoration or intimidated by the harassing salesforce who will stick to you like a glue and won't leave you until you end up buying their products.
The girl who sold to me 3 products for more 200 Euros (which I neevr used and got rid of), tried all kinds of arguments, and even some suspicious offers, changing the price each time drastically.
Long story short, avoid it!