I have eaten at Kenzo so many times. I've enjoyed my experience at Kenzo almost every time. Kenzo is super good at serving out your food orders fast which is a plus. However, the downsize of Kenzo is that after eating there, you might feel a bit dehydrated because there's more msg in the broth.
One time I had a meal at Kenzo, I felt super dehyrdated for a period of time probably mostly due to the msg they used. I just wish Kenzo could make still make tasty ramen minus the high sodium and msg.