Although in our 60s, we must have been two of the youngest people there! A very strange mixture - we had a lovely spacious and comfortable bedroom with two balconies overlooking the pools, delightful gardens, convenient location, and naturally-heated pools. On the downside, the restaurant was dismal and not particularly friendly; the food quite average; no snacks available at the poolside bar (which closed for lunch) meaning that you either ate in the dismal restaurant or went elsewhere - we did the latter and found a nice and resaonable pizza restaurant nearby.
Staff poolside liked guests to obey their rules - for example, one towel per person for pool use during your stay, and it was your responsibility to take it to your bedroom to dry it overnight and bring it back to your sun lounger the next day.
WiFi available in lobby only and €5 for an hour. Not a particularly fast internet connection.
I would have expected more from a four star hotel.