Koo is well-known as one of the best sushi restaurants in the San Francisco area. Their most famous dish, the spoonful of happiness, has been featured everywhere from SF Food to Yelp to Foodspotting. The restaurant itself has won many awards as well.
Of course, with such great reviews, we had to try it out. The “spoonful” of happiness, however, is actually two spoonfuls, accompanied with a shot of sake (which, it should be noted, I did not have). Aptly named, these two spoonfuls were like bursts of sunshine in my mouth, and even though I was sick, I could still taste all of the magnificent flavor of this dish.
The spoonfuls of happiness are definitely blog worthy, and I would definitely prescribe the heightened sensations of flavor in the spoons as comparable to the amuse bouches in michelin restaurants.
Unfortunately, we were a little late for their happy hour special of $5 a hand roll, but we still had a hearty, delicious meal at Koo. Happy hour does end at 5:30, and the prices then are much lower, so I would advise coming in a little before 5:30 if you’re going for dinner. 
Above are the handrolls, with hamachi, unagi, spicy tuna, salmon, and dynamite rolls. Of these, the dynamite and spicy tuna were my favorites, though I am very fond of salmon. The hamachi and salmon rolls come with an addition of avocado, so avocado lovers! That’s a plus! I do think hand rolls are a little easier to eat than regualar sushi, but I’d still be careful not to drop the whole thing into your soy sauce! (I totally don’t do that)
Oh also– just a reminder, Koo is closed on Mondays, because that’s when fresh fish traditionally comes in (hence most sushi restaurants are closed on Mondays).
After munching on too many hand rolls, we got (wait for it) more rolls! YAYYYY! The rolls below are the koo roll, J&L roll, and baked scallop roll from right to left. 
The Koo roll is as named, the restaurant’s signature sushi roll. Filled with snow crab, cucumber, shrimp, and spicy tuna, the koo roll is the leftmost roll and is topped with fresh avocado. This was one of my favorite rolls; it’s a little spicy, but that’s what makes it good. The J&L roll, the middle roll, is half rainbow and half dragon, combining two classics into one. Even though the Koo roll was by far one of the best rolls I’ve had, the baked scallop topped it by far. The scallops melt in your mouth, and the traditional snow crab and avocado combination only adds to the flavor.
I would go to Koo every week if I could, and I absolutely love this restaurant. It’s traditional, but blends new and unprecedented flavors together into combinations like the spoonful of happiness, at the same time turning classics like the rainbow and dynamite rolls and making it their signature by combining them. For information about hours and a full menu, visit http://www.sushikoo.com/
🙂 🙂 🙂 🙂 🙂
-Anya