Review of MAC Studio Finish Concealer by ergi
The best concealer I've tried. It gives a perfect skin color/texture match and lasts all day. It needs to be applied over moisturizer though or it goes on like spackle (the flip side of its great staying power). Creasing can be a problem, but it's usually fixed by blotting sheets or powdering.
*update 5/04* (not that anyone reads back to July :P) - tempermental concealer... creases on oily days, crusts on dry days. Best on young, smooth skin - it emphasizes creases and texture. Ack, the next step might be Cle de Peau.