$4.50 for a latte, but it's a double shot so the price is actually reasonable.
The iced latte was very good. Good strong espresso and they had simple syrup for me to add, which means that I can actually sweeten my latte (sugar just won't do because it won't melt). :)
The croissant I had was awful. The interior was like Wonder's white bread. All bready, no flaky buttery goodness. It was seriously disappointing.
Come get your coffee and latte here, but skip out on breakfast. Mercury has a funky hipsters-who-grew-up-but-don't-want-to/grungy/motorcycle-gang vibe to it. You can hang out here, if you think Riverdale Perk is a little too yuppie for you.