Just got off of this ship on my fiancé and I's cruise and we had an absolute amazing time on Carnival Sunshine!
This is a pretty lengthy and in depth post, so if you don't like to read full reviews you might want to tl;dr this one.
Carnival has packed all of the Fun Ship 2.0 enhancements on board this newly renovated ship and has really improved the ships decor from its old, glitzy Vegas themes to a more contemporary and cool feel.
My fiancé and I had the junior suite cabin on the spa deck, deck 10, and we loved it! It had a walk in closet for two, a nice big screen television, a larger balcony, and a lovely whirlpool tub in a larger than average bathroom. The only thing that we didn't like about our cabin was that its large and gorgeous balcony was intruded upon by peering eyes from those staying on the newly added decks on 11 and 12. Since the newer rooms on deck 10 protrude outward from the ships infrastructure, they are partially exposed from above, thus resulting in the privacy problem. Those people gazing out to the sea from Deck 14 on Serenity were also able to see on to a portion of our balcony. It was a little disheartening when we wanted to spend romantic moments looking out to sea on our balcony.