You realize there is nothing on Andros right? Andros has great Bone Fishing and great diving. No mall, No Starbucks and Resturants being open is hit or miss. Gas was 7.50 a gallon. No rental cars. We rented a car from a local named George for $750 a week. I began bringing my own coffee because the place we always stayed ( The Marina Hotel) only had instant. Where are you staying? I would suggest Little Hope Bay Resort. I think they turn the power off at 11:00, may be wrong about that but that is what I heard.
As far as diving goes, it is some of the best you will find anywhere and you will be sorry you missed it. Andros does not get a lot of wear and tear so the reefs are pristine with lots of life. Lots of fresh water blue holes, (many people don't know that Andros supplies the majority of the fresh water for the rest of the Bahamas.) Get certified before you go. Not unusual to see Tiger Sharks and the occasional Silky. I have seen Eagle Rays in 5 feet of water while snorkleing. You'll have a great time, just rememder if you look up laid back destination in the dictionary, Andros pops up first.