There are pros and cons to the organization, I was in the program for 3 years:
Cons: Depending on the individual unit, the professionalism issues and power trips that come with any adult-run youth organization are present. I saw the same thing in Boy Scouts, but if you take it all with a grain of salt, it's manageable. There are also a lot of STRANGE kids who think they're on a fast track to the Naval Academy or BUD/S, when in reality they can barely pass a Physical Fitness Assessment. Again, focus on the opportunity to learn about the Sea Services.
Pros: Prior to my involvement, I had little to no knowledge of the Navy or military life in general. I was interested in learning a bit more before deciding on my general life direction in relation to a career. I was afforded the opportunity to get a lot of broad exposure and experience some pretty cool stuff (did "Summer Training" with USN PBRs in a Special Boat Unit, Coast Guard small boat patrols, and a Coast Guard helicopter unit, which sold me on aviation). Most importantly, it got my foot in the door with NROTC at my university, so I had a bit more of a heads-up about what I was getting myself into.
Go check it out, there's no commitment. Might be something you like, might not be.