The restaurant itself is nothing to write home about, but the service is efficient and the ramen is very, very tasty. It's authentic, which I love, and priced well under $10. The bowls are large and very filling, and the add-ons are all around $1 each which is fantastic.
I ordered the standard ramen and added corn, and was very happy with it. I would've like them to bring over chili or something similar, but that's alright.
Absolutely worth trying if you're a ramen fan - Vegas has a bunch of options, but this is one of the better "non-fancy" ones.