Ginseng seems to be a hidden gem, probably because it's still fairly new and it's in a location that doesn't get much foot traffic (up a few escalators in Imperial Palace). The place wasn't very crowded around dinnertime, which was a bad first sign. However, the ethnic composition of the clientele was pretty heavily Asian, which was a good second sign.
They did not disappoint. Their Korean dishes were not A++, but they were pretty authentic and good quality. 12 bucks is a little more than I want to pay for soon tofu, but hey, it's Vegas. Plus, you still get the free kimchee and assorted appetizers. They also have some Chinese and Japanese dishes that looked to be reasonably authentic.
And, as everyone before me has mentioned: open 24/7 ftw!