I visited on an all day pass which cost €26 plus the cost of a hair net!
The changing rooms and lockers are accessed by a bracelet given at the payment desk.
Outside was a main grassed area where the majority of people were sunbathing. Around here were two outdoor pools, one with jacuzzi beds (they weren't all working). Indoors there were children's pools, a slide, steam room, sauna, plunge pool and more terraces. All were accessible for the entry price.
There was a cafe and the prices were reasonable and paid for by a tap of your bracelet which was a good system.
It was warm enough I managed to burn the sole of my foot on a short walk to the pool!
Overall a nice place to visit, my only negative being the showers which were open and lacked privacy, maybe it's a European thing.
After cycling for three days it was the perfect way to end our trip.