The prices have gone up substantially in the past year and a half, and it's no longer a 24 hour pass but only a 12 hour pass. That is something to note. You basically have to look out for the groupons to get a better deal. Anyway, I comment this place for the clean way in which they keep the spa. The cleaning ladies are constantly on the lookout for stray towels, and there are always fresh towels in the cupboards. The bathing portion of the spa is kept spotless, and I don't remember smelling or seeing anything unsanitary. Note: you are required to be naked in that area. The common room features a number of dry saunas and a freezer to cool off. The clay balls room does have a feet smell to it, but that is to be expected since people immerse themselves in the balls and sweat it out. The cafe has decent choices of Korean dishes. Be careful, though, you'll be surprised how much it all starts to add up when you spend hours there. I would say plan for at least $60 if not more per person per trip.
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