This is by far the best under-eye concealer I have ever tried. It's the ONLY one that actually hides my under eye circles. And I have severe, dark circles hereditary..
It actually works it's best when you use one shade DARKER than your natural skin tone and under your foundation. You can apply a highlighting pen over your foundation if you want to brighten the area. This is the best way to use it, it actually conceals the dark circles and not accentuate them, like all other concealers I've tried, and I've tried A LOT of them!
I used to use Erase Paste (which was ok, but nothing special) and Bobbi Brown, which is also good, but not as good. Salmon concealer has the best tone, it's pinky-orange color really covers the darkness.
BUT, the one that works better for me is the one in the pot, not the compact one. The formula in the pot is much thicker and so it covers better. This is actually a con, since the pot is quite expensive..
Update 2/27/14: I think Eve Pearl has generally made her salmon concealers less thick. The concealer in the new pot I bought doesn't seem the same when applied. I have been using this for more than 2 years now, I first bought it when it was a fairly new product and it was more than great. I believe the consistency has changed now, unfortunately.. I still like it, I just have to use more to get a good coverage.