Saba is excellent diving. Lots of fish, lots of coral - can be a bit deep in places, (the reef starts at 100 + feet at some sites), but there are lots of excellent shallower sites to dive as well. Don't bother trying to dive at St Maartens when you are there, just take in some sites on the island if you have a chance. A great island to wander around on so so diving. Saba would not have been my first choice if your are a beginner diver as some of the best diving is quite deep, but one of the top diving spots in the Caribbean IMHO. Don't worry at all about being a newer diver, however. There are lots of sites that you will fall in love with that are really easy to dive.