The formula is very liquid and fluid, meaning you have to use it sparingly and carefully to not end up with eyeshadow all over your face. It applies like a cool cream and blends well, as well as building up a stronger colour with layers. It does take a while to dry so it's best to apply when you have time to hang around and create a strong result. What I do really like are the subtle shimmers and sparkles that catch the light and create a 3D effect. I've been using shade 'Luxury Torch' which is described as a 'violet with gold pearl', which is a colour I wouldn't normally use but it really works with a strong black liner for a smokey, sexy look.
The only thing that's annoying is the fact that it's in a giant pot, meaning you have to be uber careful and stingy with the amount you pick up either on your finger or brush. A little goes a long, long way! These shadows are available in 16 different colours from teals and greens, to purple and blues so you can create a rainbow of eye looks at your pleasure. Priced at £13.50 I don't think it's overpriced either as you do get a huge pot to keep you going for a while. Get down to your nearest MAC counter pronto though as they're only available for a limited time. (Probably before they're re-packaged in a year and launched as something else!)