We went to Crystal River a few years ago. Very nice people, Tom took us out on his boat one evening.
It is a small uncontrolled airfield
Advantages:
Very short taxi distance
Not very busy so no holding for long periods for other traffic (expensive as you pay for the time the engine is running)
Disadvantages
Not much traffic...so you won't get much practice at dealing with a busy airport ie proceedures and radio work.
Overall a very nice place to learn to fly.
They also have an aerobatic aircraft so get them to take you up for a spin or two..well worth the experience