I came to use the spa and restaurant. It's lovely that this option is open to locals as well as hotel guests.
My personal preference is for a spa with natural light, so I immediately felt a little claustrophobic in this spa as it has no windows / natural light and the lighting is intentionally dimmed. However it's clean, calm and well managed. Good size sauna, steam room and jacuzzi. The tiles are quite slippery underfoot.
Had a delicious warm gluten free scone in the bar downstairs, with a gorgeous sea view. Super chilled vibes.