The environment is nice and funky too. Bare walls and floors with minimalist tables and chairs, and a couple of spaces to sit down and hide, or watch Leather Lane market go by through the floor to ceiling windows. Copies of fashion & design magazines (Wallpaper*) are available.
For some reason, populated by Australian baristas. Seems to be a theme now in London. Perfectly pleasant. See their website for more details.
Downside: coffee and sandwiches are eye-wateringly expensive.