I have a Studio Luxury in Bldg 8. Even with its separate bedroom, I wouldn't think of bringing another adult couple with. It works for one grandkid at a time who were 18 and 15 when they came with on different years. The eating area and deck is fine for 4 adults. But the sleeper sofa in the living room could be an issue.
When we came on a different week, we were in a One Bedroom unit and it was basically the same, except it had a very small second bathroom, sink and toilet, only slightly larger than those on Jet Blue. That was in Bldg B4.
The units facing Great Bay were built earlier and may have different floor plans than those in G and D.