I have many of these colors :P I absolutely love them, they're very vibrant. I am currently wearing "Emerald City" Green with Black OPI Shatter on top :D ... but my main faves so far is the "Blue Me Away" and the "Power Pink"... about 95 % of the nail polish I own is the Sally Hansen Hard As Nails Xtreme Wear :)
Works great on my combination skin. I dont have to apply as much foundation when wearing the perfecting base. My makeup seems to last longer throughout the day when I wear this product, when I don't wear it the oily bit of my combination skin gets through my foundation and so on. I like this product, it makes my skin feel soft as well.