I believe it was Cruisecritic.com, select Carnival forums, and I think the title of the thread was "Aft balcony - yay or nay?" It wasn't the room that was so great (though it was fine) but the view from the balcony of the wake of the ship that just looked fantastic!
FYI, some say the aft balconies have no breeze and they find them too hot. I don't think that's going to be a big issue on this cruise for me. My last cruise to Cabo I almost froze. Hot sounds great to me!
When are you cruising Chacooe?