This is a pretty cool product. It really does line the lips while applying the lipstick and the two colours compliment each other beautifully.
The formula is very comfortable and I get about 3-4 hours of wear time. It is quite pigmented and opaque and when the colour fades, it does leave a stain behind which you can just top up with a gloss.
Since the actual lipstick is so thin - it does go down pretty quickly. Also, it is definitely up there in price. Worth the splurge if you are a sucker for fabulous packaging, unique products and really just trying to build on your collection.