I was in NYC in April, didn't get to go to Ramen Lab but did visit YUJI, and Ivan. I think you can skip Ivan, but YUJI in Williamsburg was surprisingly good. They serve mainly mazeman ramen, but also have specials that are broth based. The reasons why I like them are, 1) it a small place with a reasonable wait, 2) being small with a low ceiling, the small of the broth flows outside while you wait and while you eat. Which makes thing more delicious. 3) Both the mazeman and broth based ramen was very enjoyable, and the noodles are on the harder side, which I like. The broth was a fish based broth they made with fish head, it was light yet full of flavour. (I am a fan of Assari type of ramen, much more so than tonkotsu.)