Embarkation was very stress free and easy, only headache was that they had mixed up who was staying in what room and this continued to plague us the whole week even after we had changed everything at the Guest Services Counter.
Yes the lines are long as everyone says everywhere you go and you just have to bare with it.
You will need to be patient with things like getting your breakfast and lunch, getting an elevator etc.
A 6A room...Great balcony, great location on the spa deck, the washroom was very spacious considering your on a ship. Lots of closet space for your belongings. Super clean given the room stewards clean it 2 times a day!
I would suggest given Carnival is making millions that they upgrade to flat panel TV's in each room as this would give you more space and a better picture, and I'm sure they could get a deal on them!