The formula is supposed to be a "weightless liquid highlighter" that has a "refined high-pearl finish" that wears for "eight hours." It can be "layer[ed] under foundation" or applied "over foundation as a highlighter." The consistency was smooth, thin, and had a touch of slip to keep it from feeling like water but was still easily mixed into foundation and moisturizer, applied on its own all-over the skin (like a primer), or dabbed on top of high points of the face to highlight. The latter I liked using fingertips or putting a touch on the back of my hand and swirling a synthetic brush in, then tapping onto the high points and using the edge of the bristles to diffuse the highlighter onto my skin.
It had semi-sheer, buildable coverage, depending on how much was used and how it was applied. It added noticeable luminosity when layered under foundation or mixed with foundation (assuming one did not layer a full coverage, matte formula on top!). They had a very skin-like luminosity--natural, glowing, but not overtly shimmery and definitely didn't emphasize my skin's natural texture. The formula dried down in 10-15 seconds and stayed on well for eight to nine hours on me (when worn as a standalone highlighter).
The average rating based on all reviewed shade(s) in this formula is shown below.
Add an extra dose of exceptional, long-wearing liquid pearl with M·A·C Hyper Real Foundation. This weightless liquid highlighter imparts a dreamy glow with a refined pearl finish for a complexion that immediately looks brighter, dimensional and healthy-looking. Goes on smooth and silky upon application and adheres to skin for all-day illumination. This silicone-based liquid is sheer-to-medium in coverage with a satin sheen that is meant to be seen. Layer underneath foundation for an alluring allover radiance, or apply over foundation as a highlighter for intense pearlescent illumination.