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'.

Definitely the go-to gold shadow in my collection. It's pigmented and shimmery enough that, to me, you don't really need a primer and that's helpful when I'm in a hurry. Love Amber lights!

Sophisticated atlantic blue

I really love that color! Probably not very popular eyeshadow because the color looks very bold at the first time but It is a royal blue very elegant, all the makeup looks will look sophisticated! I have to say, this particular eyeshadow is not very pigmented, you necessarily have to apply before a base of the same color to get intensity, anyway, I like it!

Oh Yeah, i love it!!!

As u can see from the name, its a bright gold color, the color is very good for yellow undertone skin colour like me , the color is very pigmented, no fall off .... This is my favourite color so fat ^^

Fabulous

I adore this eye shadow, its easy to apply, gives your eyes a bit of colour as well as definition. I would be lost without it. Its by far the best eyeshadow out there It is smooth, and says on for hours, it has good base. I would recommend it to anyone.

Must-Have

My favorite eye-shadow. I use this to complete my smokey-eye look, and it serves me well, giving a slightly shimmery effect to my eyelids. Unlike some other MAC shadows, Moth Brown is very smooth, thus ensuring an easy application and even coverage. The formula is blendable, and the color is entrancing. Though supposedly "brown," this shadow is slightly more grey, but with depth of tone...You can see purple and a brown/blue shade in certain lights.
I don't know what I'll do when I run out (I neglected to get a backup!), but this is a holy-grail shadow for me.

Great everyday colour for green or blue eyes! Soft and pretty.

This is a favourite e/s. I use it a lot for bridal work as it really compliments green and blue eyes due to it's slightly orangey hue. It's shimmery without being too much for a more mature eye and it's pigment is really pure so you don't need to apply a lot of product to get a great effect. Works really well on top of Mac Paint Pot Groundwork with Mac eyeshadow Cork in the crease. Also a great colour for Asian Bridal too. I would reccomend using a base with this and all powder eyeshadows to avoid creasing from the warmth of skin. Beautiful colour. 10/10

Amazing!

I am really into brown nuetral eyeshadow, I have a photo with me wearing this eyeshadow. It is by far the best I have ever used! It is smooth, and stays on for ages with a good base. Tottaly recommend to anyone who wants to go a little over the budget with great quality eyeshadow!

Love it!

I love all mac eyeshadows. The pigmentation is always great and they have the largest selection to choose from which is always a good this. I have never been disappointed with MACs eyeshadow..

Great

I like the MAC eyeshadow. Very pigment which is what i like. When i wear there colors its bold and stands out which is what i like. Have a varity of colors.