I've never been to a Korean Spa before, but after visiting this place, I'm certain that I will be going more often. I came here on a random Thursday morning, and it wasn't busy at all. They have a bunch of sauna rooms. Some of the saunas are designed so that you can take a 10 minute nap and not feel overwhelmed with the heat. I also like that this place has a "chill" room to cool off after coming out of a sauna or a steam room.
I loved that they also served food there. I had their KRN beef ribs, and it tasted BOMB! Totally worth it. My friend and I stayed there for 6 hours, the longest we've ever stayed at a spa before. Granted, we did take a 2 hour nap in their nap room. My friend slept in the "yoga room"
I paid $10 on a groupon deal that allows me the use their facilities all day long. Worth every penny, and THEN some. If you were to go to ceasers palace for their facilities it would cost $40 bucks for the day pass (still worth it though). If you're in Vegas and trying to recover from a hang-over, check this place out, it'll do wonders.