This is one of the better quality Korean restaurants in the city. The prices are noticeably higher compared to other Korean restaurants in the city and they don't have unlimited refills on side dishes. But still worth it if you want better ingredients. And they are sitting on prime real estate so a premium is expected.
This place has the best bibimbap in the city if you ask me. Fresh ingredients, and many options for bibimbap.
Service is not something I care about too much for an Asian place but it's what you can expect from most Korean owned places: chronically understaffed, and "ok" English communication skills. Depending on where you sit flagging down a server can be difficult. I don't really mind. If being pampered by a nice server is critical for your dining experience, I would say don't visit an Asian place to begin with.
Verdict: worth a try if you want good quality Korean and willing to pay a little extra.