This turns any nail polish matte, so essentially it gives you a whole new collection of nail polishes. Whether or not all of your nail polishes look good matte is another story. There were a few colors that were not flattering in matt, but that is hardly the nail polish's fault. Overall, it does what it claims and does it well. My nails are weak, and no nail polish stays on my nails very long, so I cannot really attest to its lasting power, however. All I can say is that it lasts as long as most other top coats (OPI, Seche Vite, etc).