I have done the Saba-Statia-St Kitts trip.
This was my first (and only) experience of diving in the Carribean. I did enjoy it, as it is very different from diving in the Red Sea or South-East Asia.
I found most of the dives really interesting, not spectacular, but still beautiful and with enough fish.
I have done several of the land tours. Unlike Kleppta, I would suggest to do them. It gives you an opportunity to see something else than the underwater and the view of the coast from the boat... Again, this was my first time in this part of the world, and I found it interesting to discover a bit of the islands.
Regarding the boat, I found it was well arranged for diving, except for going in the water. You have to jump from higher than I like (maybe 5 feet).
The crew was friendly and the whole operation is run efficiently. You can do up to 4 dives (including the night one) every day.
Regarding the dive guides (they must have changed since two years ago), I would have liked them to be more attentive to the divers (we were all not very experienced divers). Also, they were more showing us the way than showing fish and different creatures... Again, maybe I have been spoiled by diving in Indonesia or the Philippines where the guides I had were showing me 10 creatures for one that I could spotted myself
...
To Jandee: I did this trip in December 2008, it was a bit rainy and the sea could have been calmer: we could not do the Pinnacles in Saba because the sea was too rough. But besides this, weather did not have a big impact on the diving.
Would I do this trip again? I think I would go back to Statia and but would stay on the island itself and choose a good operation with excellent guides. Or, funnily enough, I would try the Turks and Caicos trip because I was also hesitating between these 2 before finally choosing the Netherlands Carribean.