I'm an asian MMM, which means I have yellow undertones. I have this foundation in Sand and it works well. Not great, but good enough. The color match is alright, though in certain lightings (like ugly white flourescent lights in buildings) sometimes the foundation looks too pinkish.
As the bottle warns, you have to work quickly so the foundation doesn't set in patches all over your face. The easiest way to do it is not to do the usual five dots all over the face, but to do one area (e.g. forehead), one dot at a time. This is not a big problem though, and the tradeoff is a foundation that does stay on the face longer than non-long-lasting ones.
The coverage is not too heavy, which means certain blemishes will show through (for me this means a few dark pimple marks). I find this acceptable, as I don't want to go out with a mask on my face; all I really need is a nice long-wearing foundation which will even up my splotchy skin. I suggest you don't try to layer the foundation on too thickly, as I believe this is when it gets cakey, as other reviewers have said. Use a good concealer to hide blemishes or undereye circles instead. The foundation lasts almost the eight hours of my workday. I actually like it better an hour after I've put it on, as by then the just-put-on-foundation look is gone, and the effect is more natural.
The foundation stays on well enough to take powder and even gel (yes, gel!) blushes. I would consider repurchasing this, though I'd try other brands/lines first. I'm off to try Max Factor's Colour Adapt next, as I really want a natural look that will work well in any lighting.