Is Sinful Colors nail polish ($2) better quality than Chanel ($27)?

That's what this Consumer Reports test determined, at least in terms of wear time. I guess they just tested one color from each brand though? There are usually significant differences within each line, in my experience. I guess it's enough to show that higher price does not necessarily guarantee a better product (shocking!).

Meanwhile, I've never had a nail polish last more than 4 days, no matter what combination of products I use, and I think even that has only happened once or twice.