We started with a seaweed salad. In keeping with the lounge theme, it was presented to us in a martini glass. Very pretty, but the salad was fairly average.
We also got our money's worth in terms of sushi. Our host recommend the sea trout, so we had sashimi (on the right of the picture). We also tried the Crazy Crunch and the Sakura rolls. Crazy Crunch is in the middle.
The trout was something we never tried before. It had a very similar texture to salmon and a mild flavor, but with a slightly fishy aftertaste. Both of the rolls were good, but I definitely preferred the Crazy Crunch. Overall, both of these rolls are very similar to anything you can get at any higher-end sushi joint in the Houston area.
Nikko also markets itself as a sake lounge, and they certainly had a nice selection of cold sakes. I don't know much about cold sake though. I can say that the price of the hot sake was very reasonable, and we enjoyed several bottles.
Overall, Nikko is your typical sushi place, but with a very nice atmosphere. Worth a drive from Houston? No. A great choice if you're in Katy? Absolutely.