Niwatei is ok. I think I like Kenzo's broth more, but the deals here are better. $12.80 for ramen, a small appy and dessert isn't much to complain about.
They're pretty busy on the weekend, but service seems to move quickly enough. I liked their miso ramen, but I think the BF's Shiso ramen looked way better. But overall not too bad for a decent bite, and close to J-town supermarket for onigiri snacks in the afternoon!