Re: YSL makeup
I use touche eclat, mascara, lip gloss (it has real gold in it!) and got an eye shadow compact. Eye shadow is better than some cheaper brands bcos it stays on for longer, as in u can see the colour for longer stronger colour.
I find the mascara really gives volume and length BUT for me it tends to crumble down onto my cheeks as the day wears on, so for that reason i wouldn't get another one.
Lip gloss i love, it tastes fruity too!
If u find something u like, and u use it often, then the cost is justfiied. If u barely use it and its going to be relegated to your old drawer, just don't waste your money.