These are very lovely lipsticks and the colors are juicy and beautiful. The formula looks a lot like Guerlain Rouge G Brilliant (the shiney, sheer formula), but has a slightly wetter and more pigmented look. The best part of these lipsticks are how beautiful they look on and the colors are very pretty. I own 207 and it is really one of my favorite lip colors. It is a warm strawberry pink.
It tends to seep a bit past the edges of the lipline, so I would recommend a lip liner to contain it. The cons for me is that it lasts a very short time on my lips (2 hours or so) similar to a lipgloss.
In order to use this product, you also need to purchase the separate holder. You release the product by turning the base. Just be careful as you can not retract back in once you release the product.