It actually delivers pretty well. The story line threads the first and second one together well. There were a few things that were a little bit predictable, but not so much that it was problematic.
Overall, I would recommend watching it. Good fight scenes. The sharks were kind of hokey, but most of the other fight scenes were pretty decent.
As for younger watchers, there isn’t anything sexual in nature, just the fighting and the gore that comes with it. Similar to the level of the first.