We were there in Nov of 2004, right after Thanksgiving.  There were
moderatly affected by Wilma.

The diving was pretty good.  As usual, it's a mixed lot of skills,
unless you go with a group you know.  But the boats are small, mostly
12 max.  It's all drift, of course.  Kind of a long ride to the south,
though.  The DMs pick the dives, but they do take requests.  You're
normally assigned the same boat for most of your stay.  If you find
someone you get along with, you can request being placed together.

Nitrox is available, but you have to request it by 4pm the afternoon
before.  I can't remember how much.  I brought my own analyzer.  They
make you use theirs, but I double checked.  The fills are all in the
3000 psi range.

The shore diving is okay.  Worth one or two.  Night diving was pretty
neat, though.  Max depth is around 35 feet.  I was down for about 90
minutes and still got out with 1100 psi.  The women got 60s and were
pretty happy with them.  There's a little puka with stairs that you
can walk out through, or even walk in if you're lazy.

They have lockers to keep your gear.  Bring a cheap combo lock.  Cheap
because it will probably rust up within a week, whereas a good one
would probably rust up within a week.  Each of the rooms has a line
and hangers for wet suits and such.

Our room had the noisiest AC unit I've ever heard.  Except for the
ones in some of the other rooms.  Each room also has a dorm sized
fridge.  Most of the rooms have a huge shower.

They remind you (repeatedly) to only drink bottled water.  You can get
a pitcher filled with bottled water from the bar until about 11:30 at
night.  The ice all comes from the ice plant and is safe.

The food is pretty good.  The breakfasts are buffet and some of the
selections are "American".  But try some of the more local stuff.
Lunch was from a never changing menu, plus daily specials.  Dinner
changed nightly.  The dinner is served in the upstairs dining room,
which is much nicer.  We weren't disappointed with a single meal.  I'd
recommend the coconut ice cream at lunch.  Drinks aren't included in
the price, other than breakfast.

Downtown is easily walkable.  We'd normally walk in, then take a taxi
back.  $5 one way.  There is a very interesting grocery/department
store not too far away.  Think tortillas and motorscooters.

The dive shop is across the street.  Not much to it, really, though.

Enough?  Write me if you have any other quesitons.