As noted the showers in the spa are complimentary. And, if you do have a bit of time, the other thing that is free in the spa is the one jacuzzi. There’s a large private hottub / jacuzzi and two showers in the room. They often need 45mins to an hour to set it up, even if it’s available, due to the time it takes to clean it, and fill it with water. But if you enjoy a hot tub / jacuzzi it’s well worth the wait. Bring a glass of champagne from the bar and just relax!