I tried to spend as little as possible on Carnival's newest cruise ship. I recommend shelling out for better food and more fun.

Brittany Chang/Business Insider

• I turned down almost all upcharged amenities during my four-day Carnival Firenze cruise.
• The new ship has more complimentary family-friendly activities than some of its competitor's latest vessels.
• But snubbing the up-charged food made for a less-than-amazing cruise.

Looking for a vacation that lets you ball on a budget? You'll certainly...