Found the place via tripadvisor and booked a table online, was super easy. Coming from Denmark and not knowing Hamburg, my friend and I had a little trouble getting there (simple tourist logistics fail) but we called and said we would be late, and it was no trouble. Our table was still ready for us when we arrived nearly 30 minutes late. The sushi was super delicious, definitely some of the best I've had, fresh and not too pricey, and there was a large menu to choose from. We even got to trade out some items from a menu, no trouble. The service was great, very friendly and welcoming. Highly recommended sushi place! It's a very small establishment though, with only a few tables, which makes it cozy and intimate, but booking in advance is advisable (probably necessary). Very satisfactory experience!