If you're happy to go without electricity, and only have rain & ocean water, then this place is VERY relaxing.
We went as a family of 4 - 2 adults, and 2 kids (2 & 4) and stayed for 3 nights. Between swimming/snorkeling on a beach (where we were the only ones in sight!), walking through the villages, talking to locals etc, we were never bored. And we didn't even make it to see the extinct volcano!
This isn't the place to be if you want to keep up supermodel appearances. We bathed in the ocean, or rain water showers, and there was no point wearing makeup or bothering with 'doing' hair. Just bring a to keep it back in the humidity and seabreeze.
Mozzies were around, and even with repellent we got a few bites each. But there were mosquito nets on the beds (I think one of them had a couple of little holes, but along with repellent i wasnt too worried).
There's plenty of crabs for kids to chase on the beach. A walk into town to get a beer in the afternoon fills an hour or so, once you've spoken to a few locals along the way.
The food prepared by Emma's mum was delicious, and even the kids were full after rice, vegetables, meatballs, and fruit.
Us adults were fine drinking rain water. I boiled the water for the kids, just to be on the safe side.
The gardens are beautiful and well maintained. And the beach is great. No surf, but white sand and crystal clear shallow water for quite a few meters before the 'finding nemo' style coral reef starts.
I'd definitely like to go back. I think anyone going to Vanuatu should try to experience life on the smaller islands.
Port Vila is nice, but I think experiencing Vanuatu means seeing how the locals live on the islands.