I have the mini with diamonds in yellow gold. I typically layer it with my bean pendant and the mini modern key, or with my DBTY, depending on the neckline of the top I'm wearing it with.
I currently have the medium rose gold smile pendant on my wishlist. I don't have a Tiffany store nearby, but in February I was in the Chicago (Michigan Ave) store and saw it on a SA, and it was stunningly beautiful all on its own. Such a simple, yet elegant and striking look!
Is layering tough for others like me who aren't near a store? It's so hard for me to figure out what will look good together. I have often relied on the generous folks here on TPF who have so kindly posted photos...it is much appreciated! I will try to snap a modeling photo of mine and post it here later.