I have just returned from Naples and have to say, I had a great time. If you say what you are after then they will cater for that and show you the area as you wish.
I did just the same; a sample to see what it would be like before the CPP which for me will begin in March and I came home feeling like I have made the right choice. I think its important to test the water first before such a commitment. On the first day they sat me down and discussed what I really wanted out of my two week stay which I really appreciated so, as long as you keep in mind what your expectations are, it works well.
Others may disagree about NAC but it is really about your own personal take on the place and how you gear your course to your needs. The instructors they have at the mo are really great guys so its a good time to go.
See you out there. Hope you enjoy it.
db