I dove with Cruz Bay, 6 Paq, AND Low Key last week. All have their points for and against. Cruz Bay is great if you are staying at the Westin (as I was). Unfortunately they don't go anywhere interesting. I hadn't dove in a year, so went with them for the convenience and to refresh myself. Great service. Great Boat. Nice people. Dive sites were okay (?? Drop and Steven's Key) Mostly family divers on board. From others I bumped into during the week at the Resort, they seemed disappointed in their decsion to book so many dives with Cruz Bay as the diving was "Same **** differnet Day". Also, when they tried to cancel, 48 hours in advance, they were told that they would have to pay half as a penalty. That is downright mean.
6Paq: Really nice People. Disappointing Service. Lousy Boat. AWESOME diving. Right off she cancelled my night dive saying she was understaffed. I booked a 6 hour deal. The website is a lie: not a "smooth, stable, power catamaran, but a 24' Boston Whaler type in disrepair. Almost no dry storage and no shade. The captain and divemaster, while very funny and nice, don't really seem to concerned with helping you out much. Not that it is a terrible thing, but I had my girlfriend on board and had to help her and the other diver (she wasn't all that strong either) out of the water. No fresh water rinse on board. The Good: we went to Eagle Shoals and another site near Salt Pond (no dive log with me at work). Both were excellent sites with a wide variety of sea life and excellent reef formations. Make sure you go to Eagle Shoals! Also, the divemaster brought a digital camera with him and took many, many pictures of us underwater. I paid the $25 for the CD which I eagerly await in the mail.
Low Key: cocky *******s in the office. Enormous boat well staffed and very helpful. Great divemaster and very good diving. Since 6Paq cancelled my night dive, I booked with them. They were taking names to see if there was enoguh interest and luck have it, they called my hotel and told me to show up. We dove off Little St. james. Great place for a night dive as it is like a 3 level terrance from 20-40 feet. Nate was the divemaster. he was patient, helpful, and has great "critter eyes".
Email me directly and I'll send you my phone number.