I've heard good things about Fugu in the past, so I had very high expectations. Luckily, these were met!
The atmosphere of the restaurant is great. Aromas of great food permeate the atmosphere, which made me eager to try the food right away.
The main item I tried was the pork stomach with hot chilis. It was definitely a different tasting item, rather greasy, but good. I can't remember what appetizer I had, but it also was great tasting, and I'm guessing it was authentic as well.
Keep in mind that there are plenty of items on the menu that are more familiar, so it's not just animal entrails like the pork stomach. There's plenty of common items too.