I visited Ramen Zundo during their first anniversary where everything was half price. The queue was as probably as long as almost 2 hours and we couldn't seem to understand how their outdoor seatings were left pretty much unused throughout our entire waiting time (I would assume at least a few of people at the front of the line would not mind sitting outside than waiting even longer to sit inside that was already full.
The double soup ramen that I ordered was of acceptable quality, and so were the other side dishes we ordered. The spicy dumplings were probably a little bit better although the aftertaste wasnt to my liking. If I were to go back and order at full price, I would probably think again, especially since there are a lot of ramen shops in the vicinity and around the area, in which some are better and/or well priced.