The formula is supposed to give a "luminous look year-round" with an "effortless application." It is a dual-ended, cream-based twist-up formula that gives a "perfect lustrous glow" for the highlighting side and a "pop of go-anywhere color" as the blushing side. Most shades had semi-opaque to opaque coverage, but the more emollient consistency made them spreadable and blendable. I had no trouble applying and blending out the product over bare skin, and patted over foundation (I used fingertips) worked well for me (I tried it with Too Faced Born This Way and Chanel Ultra Le Teint Velvet).
The formula is very dewy and luminous without a real dry down, so if you're someone who tends to touch their face or needs to pull off a sweater, it's not at all transfer-resistant. On me, while noticeably dewy throughout the day, the product stayed in place well for nine hours and was still mostly in place after 12 hours of wear. It can be lightly set--just barely dusted with translucent powder--and still have some of the dewiness visible. It wore similarly over foundation and did not seem to breakdown my foundation any faster.
The average rating based on all reviewed shade(s) in this formula is shown below.