When we arrived, the price we were told was $12.50 + tax, but when we left, someone new was at the counter and we were charged $15 + 10% service fee + tax. Beware, they can change how much they charge on a whim. Not only that, when paying, they miscounted and wanted to overcharge us.
Their rooms smelled heavily of smoke, even though there's a no smoking sign. The machines were in Chinese even for some English or Korean song names.
Save your lungs and your money and don't go here.