Embarkation: Fast and easy, well organized.
Cabin: D6 vs D3? No idea the difference other than bed/couch swap. D6 was bed near balcony, which i liked. Plenty of room, lots of outlets on the desk, great lighting choices. Bath a little tight, shower and sink no cold water...warm was best you could get. AC was very poor. Be sure to leave all doors closed, lights off, TV off (massive heat produced) and blinds drawn during the day.
Food (dinners)
Bed near balcony lay out. Plenty of outlets, good storage, Shower was smaller than expected (about the size of a transporter pad on Star Trek. Some noise from above (scrapping of chairs, high heels) but not enough to be a bother (maybe one or two noises a day, ending by midnight).