We spent a week at Hipocampo Palace and Spa and cannot fault anything.
We had a suite on the top floor for myself and my 2 children. The bedrooms had plenty of wardrobe space, beds were comfortable, bathroom well appointed if a little tired, but very clean.
Breakfast were amazing and served until 11am too. The pool area was lovely with huge grassed area and plenty of sun loungers etc.
Only downside was the actual resort, downside of being in the only 5 star hotel!! We hired a car so lots of great restaurants within easy reach. Porto Cristo worth going to. Airport was about 45 minute easy drive away. Palma about an hour.