The concealer palettes are great, I mostly use the pallest color from my #5 but as a base for my e/s, it stays all day without creasing, IMO better than Urban Decay's Primer Potion.
I bought this one because I wanted something versatile, I can correct redness (with the green) and use it on other people I do the makeup with the other corrective colors.
This is a good product, very covering, because it's thick.
If you're looking for a concealer under your eye only, I'd buy the Lift concealer because it's easier to work with.
But for a pale person, I'd use the #1, #2 would fit better on asian, #3 and 4 for darker skins.
The pallest color in lift concealer is #1, but from what I've experienced when I did people's foundations and concealers in store is that #3 fits a lot of people.
Edit :
Here's the #12 concealer
In my #5 palette it's #13, but #12 is paller and more versatile, as I can use it to make my e/s pop! Like if I was using a white NYX stick or something like that. But I prefer MUFE because the quality is there, it never let me down