Sure, it's a bit overpriced for a bowl of noodles, but I don't know of any other authentic ramen places in the bay area.
The service varies; usually, they are pretty attentive since the store isn't very big, but on at least one occasion, the food took forever to prepare.
I think I've tried pretty much every ramen on the menu. The Ryowa ramen is always a good choice if you've never been to the place, but the miso and shoyu ramens are also pretty good. I used to like the wonton ramen a lot, and I also am a fan of the butter corn. Suffice to say, they're all pretty good. If you're hungry, consider getting the fried rice or potstickers with your ramen.
I think it's best to go for lunch, since they have lunch specials where you can get rice and potstickers with a slightly smaller bowl of ramen for under eight bucks.
Ramen is not expensive, but it's VERY delicious. My wife and I love inexpensive/easy/relax restaurants with good quality of food. This is the place we will go back every week. Even thought you don't get much option of Ramen or appetizers, but we can live with it. We will 100% go back and recommend to our friends.