This is one of the best - if not _the_ best café in Stockholm. One of the proprietors - Oskar - previously ran Tvålpalatset, which was the best café in Stockholm. Drop Coffee has even higher ambitions as they are now refurnishing an entirely new location close to Mariatorget subway station, where they'll serve coffee using state-of-the-art machinery, great knowledge of the entire coffee-making process and excellent service.
The people involved are really passionate about everything involved with coffee, not to mention they're holding courses in everything coffee.
They're on http://dropcoffee.blogspot.com and http://twitter.com/dropcoffee