Always good, not always cheap!
And of course I am referring to having a coffee in Paris. The Cafe de Flore is located on Blvd Saint Germain, in the area where the likes of Hemingway, Fitzgerald and so on used to hang out and write American classical literature.
If you're on a budget, by all means walk down the boulevard and check out these cafes, but you'll find cheaper prices off the main drag. Still, it is an experience so spoil yourself at least once!