Yes, MAC is great. However, I don't think MAC is the BEST out there.
I absolutely adore my sketch eyeshadow. The color is so gorgeous and unique! This one applies nicely, but some of the other colors can be a little chalky.
Sometimes it can be difficult to get the color in the pan, onto your lids. I expect great pigmentation when I buy MAC shadows, but sometimes they do fall short of 'the best'.
One of my top ten favourite colours!
Its a perfect all over eye colour with a little black blended into the lash line or great for just being blended into the crease gently with winged eyeliner. Becomes a great eyeliner colour if applied with a wet angle brush. It highlights blue/grey eyes superbly. Highly reccomended.
My quick take describes it all, this colour is so soft and smooth with application. It being a 'velvet' finish is completely suiting, because that's what it feels like. I love it so much because it's so workable too, even though the colour is a little unusual. Sketch works amazingly as a base for a coloured smokey eye, on the lower lash line, as well as adding a pop of colour to a neutral eye to mix it up a little.
I can't say enough about this eyeshadow, I bought it over the christmas period and I've found soooo many uses for it. It is literally amazing and I think it's my favourite eyeshadow from mac so far.