a2o Lab Locked Eye Primer

Yes, A20 products come at a higher price tag but the quality is reflected in that price, with pro performance and formulas. I don't ever regret paying a little more (and still way less than even drugstore cosmetics) for things I can confidently put in my kit, as they compete with expensive professional products.
This is a better product by far than the last Miss A eyeshadow base and my favorite offered here.
The shimmer base is an inventive option, but I will get the most use out of the pinkish sheer! I use it UNDER my eyes, though! Eyeshadow primer is the best prep for under eyes where creasing is just as much a concern and the fact this is brightening, silky and emollient is perfect. I apply sparingly (after hydrating well and letting the serum soak in, using the recent under eye serum from Miss A in fact!) It's not that it won't work for eye shadow, but for very oily lids I still prefer Sigma's cream stick eye primer and Miss A has nothing like it at this time, all the eyebases other than the tacky one are the silky silicone types. But while our eyelids are producing tons of oil, our under eyes are doing the opposite, so this product helps compensate. Haven't tried the "nude" but it may be a better choice for the lids for most light/medium skinned people, as it seems to be a warmer shade which would help correct and balance purple and blue.