Far exceeded my expectations for the price and a wonderful experience that I would easily recommend if you want to enjoy 5 hours for the locals price of $20 for a spa.
There are 3 sauna rooms upstairs, including a movie theatre that are co-ed if you miss your significant other or opposite sex friend.
The spicy ramen soup which included kimchi for $10 was a bargain.
You may want to bring a book or magazine, unless you want to watch subtitled Korean soaps. You don't need to bring anything because towel, clothes, and robe are provided