Book it! We are from the US and stayed here in late Nov, with 4 adults and kids, 1 & 3. It is beautiful. Sleeping arrangements were awesome, the flat was so child proof, spacious and comfortable, the kids could be let go to run around the flat without worry. Quiet inside, walking distance to the water and other sights. Lot's of food options around. We were very, very happy here!
Oh, please do not miss the Oceanarium, with or without kids. We heard it is the best in Europe. I would say maybe the best anywhere. The giant red octopus was worth the visit all by itself. Enjoy!!