I have been on Blackbeard twice (2003 and 2004) and the best way I can describe it is like camping at sea. The bunks are not large but I never felt claustrophobic or cramped in mine. I was in the Galley once and in the forward cabin the second time. There are benefits to both. In the galley you are also closer to meals and showers while the other cabins allow a little more privacy. keep in mind you have to come up to main deck to go from between cabins as this is not a large boat.
First year we had a capt. that lost it and cussed the mate out because he had a fishing line in the water. But other than that crew was great and very helpful.
I have heard horror stories about mean jerks of a crew from other divers who went on different years though.
Both times there was problems with the heads getting clogged up at least once during the week, the water maker broke once, and did I mention they only give you 30 seconds of fresh water per day?
I realize this has been a few years ago so hopefully they have had time to fix a lot of the aging equipment on these boats.
Again, if you want luxury then you need to look at other liveaboards which really aren’t that much more in cost if you factor in the level of comfort.
I am going on anothe liveaboard called Juliet this coming May and will post my review afterwards and include some comparisons to Blackbeard.