It is a lovely location with a great natural harbour/anchorage. In addition to the volcano there are some thermal vents in the anchorage that steam and spit into the sea, creating hot spots that are a little too warm for comfort in places if you swim too close! There was some great snorkelling here with quite different corals from that which we have seen elsewhere with some beautiful red gorgonian fans.
They have a "yacht club" ashore where you can hang out and where they have put their scarce resources into being able to provide cold beer!
The World ARC fleet took up most of the available anchoring spaces, we stayed an extra day and were then one of only 3 boats left in the harbour which gave it a very different feel.