I found the display at Bed, Bath, and Beyond the day I picked up Essie Case Study and I picked up four of the eight shades: Spice It Up, Mistletoe, Decadent, and Glitz & Glam.
First up, the collections namesake:
Spice It Up.
Spice It Up is a wine-colored shade with coppery shimmer, giving it a rusted feel.
Decadent is a blurple (blue/purple) shimmery shade. Pretty much identical to Wet n Wild's Sea Witch, from the 2011 Mermaid's Cove Collection and Eggplant Frost from the core 'Wild Shine' line.
Mistletoe is an forest green with golden, green and pink shimmer. Very similar to Zoya's Edyta. Edyta's shimmer is more prominent.
Glitz & Glam
Glitz & Glam is my favorite of the four I picked up. It has light pink and fuchsia glitter in a fuchsia base. It was opaque in two coats, which I love in a glitter shade.
Are you planning on picking up any of these?