If you buy this product in an authentic form from a reputable seller then it will be a dream come true.  I have been using this foundation for about a year and would not consider switching to anything else.  Along with my Tarte airbrush brush, it creates almost flawless base.  I have slight melasma and it covers most of the discoloration.  It never cakes (if applied with the tarte brush) and it is pretty good at controlling oil production.  My one suggestion is to go into a store that sells this product to get color matched because their color palette is off.  I am using a color called Golden Glow and I am pretty white yet it somehow matched my undertones perfectly.  Also keep in mind that this foundation goes fast so be prepared to replace it every two months or so if used daily.