There are tons of matte transforming top coats out there, Essie's "Matte About You" being my favorite so far. China Glaze's version is also lovely! The thing I noticed with this one is that the effect/drying time takes a bit longer than some of the others. The effect is so pretty though, just the same.
Here is a swatch of CG's "Drastic" alone. (2 coats)
Here is "Drastic" with CG Matte Magic added over it.
I love the effect it gives darker colors. It reminds me of those "iced" ornaments at Christmas. I also LOVE it over flakies!
Here are a few other swatches of Matte Magic from a few polish bloggers:
All Laquered Up's Swatch and Review
Scrangie's Swatches (a little down the page)
Lacquerized's matte top coat comparison
Are you mad for matte?