I saw a cove balcony, but didn't have one. With 2 teenage girls and a wife all wanting to get ready for dinner at once I elected to get a family oceanview instead. These have two bathrooms (actually one full bath and one with a mini tub/shower and a sink) But the cove balconies were on the deck above us. You can see them in this photo
They are not as close to the water as they make it sound but much closer than the normal balconies. If you want a balcony for the sun shine, don't get a cove, as you can see they are well shaded. But if you want to be able to stand outside without baking in the sun, then this may be for you. They are normal sized balconies, just enclosed.
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007