Tried it for the first time the other day with my partner and we both rated it a 3. Despite having been to Red Sushi's previous location once and knowing my way around the area I still found it hard to find - a large sign outside would be helpful. The service is good and the waiters are nice. In terms of the ramen bowls, I ordered the veggie ramen while my partner ordered the Morris ramen. After trying other ramen restaurants in Madison I had high expectations for this place (although definitely a long shot) - unfortunately it was a rather mediocre experience.
My partner and I both agreed that the broth was very bland for the veggie and morris ramen. I may have also overdid it by putting too much of the chili pepper shichimi in my broth to give it more flavor but it still did nothing. And I don't really know how much of a difference it would have been had I gotten the spicy ramen bowl. Regardless, both dishes were lacking depth of flavor. The noodles are okay, the egg soft-boiled was well cooked and the vegetables were good. I would agree with one of the reviewers, the broth and sometimes the noodles are usually what makes it or breaks it for me as well.
I would also like to mention that the edamame we got was cold - I'm sure that was purposeful but I usually prefer my edamame either boiled or steamed. The seaweed salad is like any other you can find at a Japanese restaurant. Not really impress with the appetizers. The menu's a little pricey but expected. I don't particularly care for this place but for others who are new to the ramen scene it may be worth a try.