Yes, I have been in the Sun's Penthouse Suites. Nice cabins, but smaller then many Penthouse suites on other ships. Cabins on front can be very hot in the Caribbean. Also, can be very windy on the balcony when at sea.
Guess it all depends on how much you paid for the upgrade from your mini-suite? All and all, I think you would enjoy the Sun and the many dinning choices.
If you would like to review any of this, please let me know.
The Cruise Coach