Great place but haven't done much diving there.   BUT....some other
advice (Since you didn't ask...)

AWESOME SNORKEL (Dingy ride away)   Thunderball Cave (from the movie)
ALso a dingy ride away... Big Majors.. great anchorage and a great place
to kill a 1/2 day hanging out on the beach with the wild pigs.

Do NOT attempt to snorkel in  or near the inlet between thunderball and
the mouth.  LOTS of Lemon sharks and some bulls... not a pretty pair in
the fast moving water.

From my other diving in the exumas...assuming you have a boat and it is
calm.... look on the charts where the isodepth lines are close
together... go there,put on a snorkel and check it out... Lots of nice
reefs and cliffs in the area.   Most of my diving have been 20 miles
north +-.