Chanel's Le Blanc bases are intended as a primer of sorts, not intended to be worn alone. There are four shades available (for more information see here) and I received #10 Rosee which apparently refreshes tired and dull complexions with a radiant dream glow. For the purposes of this review I used as a base to my Etude House BB Pact powder (which I'm testing today also) and didn't bother applying an additional cream/liquid base.
The texture of this base is very watery, therefore a 1 ml sample could probably easily do 2-3 days application, unfortunately I did not realize this and squeezed the entire contents out. Pfft. It does spread pretty easily so you don't need too much. This is a plus considering the full size price is around the $80 dollar mark. The shade is super light on my skin and kind of gave off a shimmery white effect. I wasn't too sold on it at first, as it gave a kind of wearing-sunscreen sheen. It has a light scent that doesn't appear to linger very long, but then again I applied EH BB Pact not long after which has a floral scent that cancelled Chanel's out.
I feel it had some brightening effect on my skin. The coverage was very sheer, and did not really cover any of my redness, but did kind of lighten my dark circles and other imperfections slightly.
Once my BB pact was applied the overall effect was a nice matte even base, and it seemed a shade lighter than usual. I guess if you were using a liquid/BB cream you would get a dewy effect - so it doesn't seem to affect how your chosen base finishes ie by making it oily or whatever.
Overall its a very nice base to use as a primer but at it's premium price I don't feel it's a must have product so I highly doubt I'd shell out the full price to add to my collection.