Guerlain 04 Les Bois de Rose is an iridescent quad with a soft pearly white, medium cool rose frost, taupe-grey-mauve shimmer, and a plum brown. The texture is soft and easily blendable. I've had good experiences with the prior releases from Guerlain, but found their older quads a bit dryer in texture making them hard to blend and requiring heavy application. The new Écrin 4 Couleurs appear to be much softer and smoother in texture, yet have excellent pigmentation.
The shimmer in this quad is on the medium-to-high side, some might find this too frosty. It's almost as sparkly as some of the Bobbi Brown Metallic Shadows but not quite as metallic-like. I applied this today over UDPP on the eyes using the sponges on one eye and my regular brushes on the other. The sponges work just fine but I prefer the brushes for a better application.
1. Apply white shade on lids (about 1/2 way from lash up to middle of eye)
2. Apply the right taupey shade on outer corners inward to middle
3. Apply rose frost from inner corner (part closest to nose) and blend towards outer corner mixing with the taupe
4. Apply the darkest shade to line and smudge along upper lashes
I'm sure there are similar colors out there, but I couldn't find a quad from Chanel or Dior that was exactly the same. I did pull out my Armani Eye Mania 05 and Dior Pink Idol quint to compare for you. Those weary of pinks because of getting that pink-eye look need not worry with the Guerlain. I avoid pinks like the plague but the Guerlain Les Bois de Rose works beautifully.