This is my first Bobbi Brown eye shadow. I caved in after reading and seeing some reviews on Youtube about this particular product. I bought it on eBay, in nearly new condition with all of the hetchmarks still being visible. After using this practically every day in one form or another, this is my verdict: You need this. Period. The colour is - unlike the name suggests - an ashy, very dark neutral-leaning-cool brown. There are no red or otherwise warm undertones in this whatsoever.
I use this in a variety of ways. I'm brunette, and this is the perfect shade to fill in my eyebrows with. I use a small, angled brush by E.L.F. and the results are perfect each time. Apart from that this is an amazing eyeshadow. Urban Decay's Twice Baked, which is a similar, dark brown, creased on me. Mahogany did no such thing. It lasted the whole day without fading or creasing. I love using it the outer V or in the crease in conjuction with NARS Portobello on my eyelids, or smudged as a liner just above my lashes and on my lower lid. The texture is firm, and doesn't seem to me to be prone to crumbling. Yet it is so highly pigmented that you barely have to tap your brush onto the surface of the pan to be able to apply it. It's easily blendable, and you can create a wonderful, smoldering smokey eye by just using this, a highlighting shade and a liner!
My only niggle is the packaging. The shiny, black plastic scratches very easily and ends up looking scruffy in a matter of weeks. I think I might invest a few more Bobbi Brown eyeshadows and in a 3 or 6-pan palette to avoid this. But other than that, this is a product so incredibly versatile, it deserves all the raves it gets. It is one of the few ones that I can see myself coming back to again and again and again! HG!