I've got 2 lipsticks:
Rouge Pur Transparent -> sheer color, rose scent is nice, but can be annoying after a while, doesn't last very long, wouldn't buy that one again, since it's too "unspecial" for that price.
Rouge Vibration -> very beautiful, vibrant color
, creamy texture, same rose scent, you get a very small amount for the price, but the colors have that glowing vibrant shimmer, so that I may buy again in a diff. color
A friend bought the e/s duo for prom, I applied it for her ^^ over a base and the colors are very intense, easy to blend and lasted the whole night. Since they have many beautiful e/s colors I might also pick one up, but yeah, YSL is quite expensive, but I'd say the e/s are really worth the money and I like the shimmering black packagings a lot