We visited the spa and bought a 4 hour swimming ticket for 2 adults and 2 children (38€). The pools are good, if a little busy, and the outdoor slides are OK. Although only one is without age restrictions and they are also opened in rotation so aren't always available to use. The outdoor pool isn't massive (the photos on the website are slightly deceptive), but overall whilst not cheap it's a nice place to visit to chill out and cool off. Personally I wouldnt bother visiting in the months when the outdoor pool is closed so it's worth checking if you're not sure.