We have been to CN, CTI and CSS and CSA. 33 out of the 4 resorts have AN areas.
We LOVE the island at CTI, but we also love Sunset Beach at CSS.
Both have their good points but CSS is our favorite for the AN experience. The pool is bigger and if you want to sneak off quietly and take a nap, the beach is huge! You can also swim in the ocean at CSS (the water is cold where the river meets the beach area and it's a bit rocky so bring water shoes!). I've heard of people snorkeling and swimming off the island at CTI, but I'd never attempt it because of the reef and rocks it sits on. One could get banged up very easily!
If you are going for the AN experience, CSS gets my vote. It's a short walk from the main resort (don't have to wait on a boat to take you over) and if you need to go back to your room for any reason, it's easier to do than at CTI.
This is just my two cents worth, but I suppose you need to try them both to find your favorite. CN is OUT for us. We don't like the setup of the AN area at all.
Couples Certified and Preferred agency!
Life's to short to spend it on the couch, find a beach and watch the sunset.