Although I never use the shimmery black shade with silver microglitter, I find myself using the other shades (a trio of metallic jewel tones in blue, purple, and green) pretty frequently. I am cool-toned, pale & have dark hair/eyes for reference.
I like the soft texture of these shadows & that you can build them up or just wash them on for a more of a glowy stain. They are a BREEZE to blend & last all-day on me with a primer. If you are a total pigmentation junkie, these might NOT be for you. On the other hand, the semi-sheer, shimmering texture is what I find most likable about Rimmel's shadows.