We had booked an inside Q category which is, I believe, on deck 6 --- just found out we have been upgraded to an outside but on Deck 2 -- not sure if I like being that low in the ship ---- does it matter? Also it is by the Entertainment Center which is where the ice skating is ---- will this be a problem? Sure hope not.
Cat Q basically means you will be assigned an inside cabin or better period. As you have been upgraded to an outside you have done very well indeed. Being on a lower deck just means that it is a couple more flights of stairs to the top decks but by the same token the ride will be smoother with less rocking and rolling.