Lorenzo Insigne's first-half brace and Dries Mertens' late sealer at the Stadio Olimpico saw Napoli win the cup for the fifth time with a 3-1 victory over Fiorentina.
Juan Manuel Vargas had given Fiorentina hope and they faced 10 men late on when Gokhan Inler was sent off.
"I think it was a beautiful game. We were in control at the start with 2-0 and it seemed simple, but then Fiorentina got back into it," he told Rai Sport.
"We could've got a third goal earlier, but we also worked well in defence and with 10 men did well as a team with real character.
"I have always said losing wouldn't change anything, but a win would be more positive. The fans saw that the team played 100 per cent and that's important."
"There is talk of him going to the World Cup and I say without doubt he should go, as he can make the difference in any game," Benitez said.
"We knew that we'd all win together or lose together. I am very satisfied with the performance. Fiorentina are a strong side and we worked hard to beat them."
