The Ship: My sister and I shared an interior stateroom on deck 6 (6583). My parents had an oceanview on deck 3 (3000). Our stateroom was really comfortable and we hardly missed the window, except it was a little hard to get up in the morning without seeing any sun.
Our room was larger than we had anticipated so we were pleasantly surprised. There is also lots of storage space in the closet, drawers, under the beds, even in the bathroom.
Im not a frequent cruiser so I cant really comment on how the ship compares to others (our last cruise was in 2000 on the Viking Serenade). It did not look old at all to me, but it did not look brand new either.