Sakanaya is consistently very good. The Willis Tower is a unique appetizer worth trying. I'm not the biggest fan of some of their signature sushi rolls, but I chalk it up to personal preference. They're still good. Their lunch combos are very good, as are ramen and chicken wings. They use quality ingredients and have good customer service. I come back regularly and have no hesitations about trying new things here.
It can get pretty busy even on week nights, I recommend reserving a table ahead with OpenTable for dinner.