The sunflower is in a great spot. Wonderful neighborhood and within walking distance of an S-Bahn stop and the Ostbahnhof. The room was great, with plenty of space and even a well-equipped kitchen. The downstairs bar was a great place to meet people, too. Only complaint was that the wifi was atrocious. For a hostel of this size I expected better. But nonetheless, it's a great place to stay in Berlin. I would stay again.