Took our 6 year old daughter on a bad weather day. Turned up at opening time at 2pm, only about a dozen other people in, so a great time to go and its cheaper, by 4pm it was pretty busy and can see why some people give negative reviews.
The main pool was cool, but the kids pools were around 30c so quite pleasant.
Kids area and lazy river were favourites for us. Climbing wall is also good fun, just as much fun watching the macho french guys trying to climb the wall (and failing) than doing it yourself. Slides were either too young for our daughter or with the tube slide too terrifying ! but plenty to do for 1hr and an half.
Shame the outside jacuzzi was closed ('due to technical reasons' - it had no water in it!), but it didn't matter to us.
Had to drag our daughter away, she enjoyed it so much.
Tips. Take your own towels, a 1 or 2 euro coin for the lockers and go early.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.