After several seasons of illuminators that didn't work for me, I really looked forward to testing this one, expecting that that its rose gold undertones would suit my complexion. While it is a beautiful product, I found it too sparkly for day or office. It doesn't illuminate, but highlights instead; "illuminate" suggests a more subtle effect than Mouche de Beaute gives. The product adds the slightest bit of pink coloration; the gold cast disappears on my skin completely, adding only a colorless sheen. The aforementioned sparkles leave a beautiful finish atop the cheekbones and under the brow bones, but it's not subtle enough to use in other areas typically highlighted, such as down the center of the nose, chin, or atop the inner brow.
Mouche de Beaute comes in pouch with a large sponge applicator. Those of you interested in a sheerer effect might want to try using a dense brush.
I bought Mouche de Beaute ($80) from Ondrea Watson, Chanel Studio Counter Manager at the Seattle Nordstrom Flagship store, 206-628-2111. It's also available at Chanel.com.