Your standard 90s coffee shop -- a dark, dingy, little nook. The coffee's fine. The iced chai is good. The open-faced veggie pate sandwich is great.
For the brewed coffee, you get to choose your own mug, though it'd be nicer if they added a few more iconic mugs -- currently they look like sally ann leftovers. They have coffee sold by the pound. I've never got it, but the people who do, love it.
All in all, a cafe to go to when you're on Roncesvalles.