I do know of a few friends who are very successful in their use of MAC Pro Longer Concealer (on some of them it looks natural), but I do have to warn people that MAC is a Theater/Stage Makeup brand. However, I'd prefer to use maybe Urban Decay Eden Primer potion because it has the same coverage and you don't need to powder to prevent creasing. It works really well as an eyeshadow primer because it makes the lid area a uniform color before layering on color. Also, if you use too much or not enough, regardless of setting it, I find it to crease on my under eye fine lines when concealing my dark circles and it actually accentuates the area.
#BEST MAC CONCEALER SKIN#
This concealer needs to be on moisturized (but not too oily) skin and if applied on any dry areas, it patches like crazy. It looks pretty good from far away but unless you're okay with looking like cake-face, I'd avoid talking to anyone face-to-face. This concealer is relatively successful at covering up blemishes or discoloration in the sense that it covers up most of the color but I can't seem to make it look "natural".