I've been using the light color of concealer under my eyes, and the dark shade over my blemishes. I didn't really have to mix the colors at all but I really like the way that the darker color covers my all my red spots. I think with a good primer this could last all day. I probably won't buy more after I run out of this though, but only because it is part of a makeup kit that is a subscription kit. I already have other things that are in the kit and don't feel like spending the money just to get that concealer.
If you want to buy the makeup kit the concealer is in, you can buy it at http://www.sheercover.com for $29.95 for a 30-Day Starter Kit.
NOTE: I received this product complimentary for testing from Influester, but my opinions are my own and I am not paid to say these things.