I bought one impulsively, and I can't say I regret it, but they weren't what I expected. I typically use a primer first and then I use these as a base and build with other shadows from there.
SC is my go to drugstore polish, I usually only need two goats and it lasts for a week. It would probably last even longer, but I change my nail color weekly. I own my fair share of colors and I've never had one I didn't like. Sinful Colors will always be my favorite, hands down.
One of my favorite drugstore polishes. Great pigmentation, I typically only need two coats for a decent look. My only complaint is that it does chip pretty easily, however I have purchased a few that were longer lasting.