I admit that I'm a little spoiled when it comes to sashimi, but I must say... there are only two things that matter to me - the freshness of the fish, and the way it's cut. That said, although the fish was reasonably fresh, the large chunks of sashimi Kotobuki serves are sub-par in my opinion. The service was friendly, but inattentive, especially considering there were only three occupied tables. If you're looking for truly exceptional, authentic sashimi, head to East 43rd St and go to Sakagura - they will ruin you for all other Japanese Restaurants.
Pros: friendly, comfy
Cons: so-so food, inattentive service