I purchased one of these pens recently and I am utterly disappointed in the product.

Very easy to use and the color selection is awesome, BUT.... it flakes off almost immediatlely after applying it. I did my nails and let them dry (it does set quickly) and went about my normal daily routine. After about 3 hours I noticed that about 30% of the nail polish had chipped off. After 12 hours it was closer to 60% that had chipped off. After 24 hours over 90% had chipped off. I don't expect too much from nail polish, but when you pay $7 per stick, you would expect that the product would last longer then 1 day.