Lines are routinely off by 1/2-1 pt. They usually take $1000-2000 although if you play the tables and there are decent sized games (NFL, NBA finals, etc) you can get down more.
One annoyance is they close at like 9 or 10PM after the last game starts, so if you want to cash, not till morning and they, being Bahamian don't open early! A few times, I have been forced to go back to the Bahamas to collect - maybe i did it on purpose!
Sean