the Givenchy Prisme Libre Air Sensation Loose Powder Quartet (wow - that was a mouth full!) is the newest addition to my powder-madness ;)
i got it in shade 2 - Delicate Beige and ordered from escentual.com for about 36£ (shipping included). i can't get Givenchy cosmetics where i live and this has great reviews on makeupalley.com. it is a loose powder with 4 different colours in 4 separated departments that should emphasize the best in your complexion (like take away dullness, brighten, even out, illuminate, refine, blabla) and works sort of like the Météorites powders by Guerlain.
the cubistic packaging is beautiful, very classy and great quality and contains 20g of product - i suppose 5g for each colour. the pouf is ok - but i wouldn't use it in conjunction with the powder, just to avoit it getting everywhere. only the sifter holes (in the pattern of 4 G's - the emblem of Givenchy) are too large - so if i want to pour the powder onto my little powder bowl to use it with a brush, i tend to get too much or i can't get an equal amount of each colour. maybe i'll seal some holes with a tape.
Delicate Beige consists of a light pink, a lavender, a light yellowish beige and a darker honey beige.
mixed together, it is a medium light pinkish powder, it takes away the dull grey veil of some foundations that are too yellowy (like Revlon Colorstay in #180 Sand Beige, or MAC Pro Longwear in NC20) and makes my skin look healthier - but definitely no Miss Piggy effect.
it has a beautiful floral scent - i like this much better than the violet scent from Guerlain powders.
this powder is very very finely milled, and my skin feels so smooth after applying it (because it also contains silica)! it gives my face a velvety sheen, a bit matte but still glowy - i can't overpowder with this, whatever amount i take.
if i look close on my hand-swatch, i can see the smallest illuminating bits, but no shimmer or glitter at all. on your face it's not noticeable. as the day moves on, the powder melts into the skin and gives it a gorgeous sheen.
it's not the best to set your foundation or to mattify long time, also it doesn't have any coverage. but i think it is a great effect powder that oilier skins can still use if the t-zone is setted with another powder and dry skins can benefit from it's silkyness, too.
i suggest you take a look on escentual.com to see the other shades that are available with this powder, i might get the shade #1 - Light Pastel some time (with green, pink, yellow and blue - in the way to even out your complexion).
here i'm wearing it: