I just went in January, and it was so much fun! Yes, there are a lot of kids, but you really don't notice them unless you are looking for them. There is a kid pool and a family pool, and that is mostly where they hang out while at sea. If you are over 18, there is an adult pool that you can escape to. I am the type of person that hates being in big crowds, especially with little kids running around, but I really had an awesome time! The restaurant Palos, which is a restaurant for adults only is wondeful! Perfect service, perfect food, and the perfect atmosphere! I know there are people that are over 18 and do not or did not like the cruise, but I know that I absolutely loved it, and want to go back real soon! It really is not a cruise JUST for kids! Hope this helps!
Jess