Review (5/5): the BEST for anything from subtle shimmer to hard chrome
This palette has become one of my favorite nail tools. I've been using it mostly on acrylic dip powder, but have also used it on top of traditional polish with a clear coat on top. if you apply a light/thin layer (or on dip powder base that has NOT been buffed), it adds a subtle shimmer. If you apply it more thickly AND buff it with the eyeshadow-type applicator, you can achieve a solid chrome look that's really fun as well. I enjoy putting it on all my nails, or just on one nail for a fun accent look that still matches my overall color scheme. I've also enjoyed using it on a relatively plain nail for a fine-textured glitter look while other nails have full-texture glitter. It's really a lot of fun and goes a super long way (basically as far as a comparable eyeshadow palette would go). Strongly recommended
UPDATE: I've ditched my acrylic powders (long story - I kayak too much) but couldn't let go of this shimmer. Turns out it works on traditional nail polish as well. You can apply it directly on top for a chrome effect, or BUFF (not file) the surface gently then apply for a soft shimmer. In both cases top with clearcoat. I still love this palette!