Hi,
I see your post only now.
St Eustatius (or Statia) is a great dive destination. I have been there twice and really enjoyed both times. The dive sites are never boring, there are some spectacular underwater "landscapes", at least two superb wrecks. You'll see lots of different kinds of fish, from tiny nudibranches to hammerhead (if you are very lucky ;-) ).
I dove with Scubaqua who are very friendly and well organized. The only thing is that I don't think they do 3-4 dives/day.
Maybe there are not so many reviews because it is not so much known yet and it is really for divers. There is not much to do besides diving in this very small island. There are only very few and small hotels (but good restaurants and bars...).
If you have more specific questions, I'd be happy to answer them (as best as I can).