My husband and I visited Colonna Park out of season, which may explain some of our disappointment. The food in the hotel was dreadful, the breakfast was nothing to be desired, the coffee was bitter and the pastries were dry, the dinner reminded us of school dinners, nothing was fresh, everything was reheated or reused and it was certainly overpriced! The room was basic and small and the bed mattresses were worn out and very uncomfortable. The pool was lot smaller to what it seems in the photo. I can imagine it can get bit crowded in high season. The hotel staff were pretentious and incompetent, they were not even able to print out our bill when we checked out! The grounds are however very well kept and the setting is rather beautiful even though bit far from Porto Cervo itself. The marina is pretty much just a marina, two bars, gelateria, supermarketa and that is all we found, nice boats though!