Our boat ride took around 2 hours as we went around the island. The blue cave was not open that day but as other rewviewer said this is not the best provider if you want to visit the blue cave.
This provider was ideal for us who wanted to see the island from the boat and we didn't have much time.
The caption stopped at various spots and briefly mentioned the name and moved on.
We did enjoy our boat trip and would recommend it to other visitors.