I love this shade! You can go from sweet to va va voom in a matter of seconds.
Sketch is a velvet formula and blends out like a dream. You do get a bit of fallout, but with the pay-off of this shadow, I can look past that. It is extremely pigmented, so you need less than 1 swipe to do a subtle eye look and only 1/2 swipes to do a more dramatic look.
Over an eye shadow primer, it lasts all day. Since you can tone it down - it works all year round. MAC shadows are not cheap, but the quality is there and they will last you absolutely ages.