We are not major cruisers (this was only our 6th), but neither are we novices, and are happy to report that this was an overall excellent experience and incredible value.
First, the few minor areas that could stand improvement, the most important of which is: upgrade the quality of your coffee, Princess. Another food issue is that hot foods (especially soups) were sometimes barely above lukewarm whereas cold foods (especially cold soups) were usually not nearly cold enough. And the dining room's service was occasionally slow, most often at breakfast and lunch (one reason we usually preferred the Horizon Court buffet dining at those times).
I must also comment negatively on one aspect of the art auction, which I often enjoy going to. But when we receive an invitation in our cabin for an early drawing for art work to be held before the auction starts, and that doesn't happen, I feel lied to and misled. Not a feeling that I think Princess (the owner or sponsor of the auctions) wants me to tale away!
Our Obstructed View cabin had as much room, or better use made of the space, than any other ship we can remember. A refrigerator and safe we appreciated (as was Princesses policy of allowing us to bring our own wine into the room), and there was enough storage for all our clothing and extras.