I absolutely LOVE Stila Eye shadows. I have been using them for years and they have played an active part in my Makeup kit for weddings and formals and daily use.
I usually buy the palettes I have 4 of them: In the Light, In the know, Spirit and Luxe. I do however own the Stila single in Mimosa and ADORE it!
Key selling features for Stila:
-Super pigmented
-Effortlessly Blends
-Versatile depending how you use them
-amazing colour pay off

and for the price that they are you get so much.
a standard palette is like $50 and you get 10 shadows that's $5 a shadow.
I prefer to buy the palettes as you get more bang for your buck but sometimes you just need or want one colour and their singles are nice too. Kinda on the higher end for pricing but there is more product in a single than there is in a palette pan.