It feels like every Ramen shop I try has their specialty. Ryu's specialty seems to be their dip noodle, and their roast angus beef. You don't find these in other ramen shops. And perhaps most importantly: their wheat noodle. Yes! You can get a slightly healthier version of ramen (hahaha "healthy" and "ramen" don't belong in the same sentence). I love the wheat noodle texture. It's more chewy and coarse.
We ended up getting Shio Plum (which other stores don't have so I suppose this is a specialty), and Miso. If I base my experience on these 2 dishes (we shared), i would say this place is alright. The Shio Plum is not for everyone. The plum taste is definitely something that would turn off some people. But it tasted good to me. The miso ramen was more or less standard.
Service is the same as all other ramen shops. They hire all japanese staff and will greet you when you come and exit. After so many years of ramen shops opening up, this point is pretty moot to me now.