The inside cabin was about what one grows to expect. It would be small if it were an apartment, but for a cruise ship, the inside cabin was roomy. With 2 powerplugs in the room and 1 more in the bathroom (non-grounded, so only certain plugs would work there, it was actually better set up than most.
I will say that having a rear-lower-level cabin, we heard a lot of noise going into and coming out of port. The engine noise was, to put if frankly, loud (since we got into port early, it did wake me in the morning). But other than those few time, it was a pretty quiet room. There was definitely ample closet space for me and my wife to put things... and plenty of room under the bed to store our suitcases. In general, it was a very nice stateroom.
The hallway on the first deck felt wider than most. In general, it was nice.