First of all we really enjoyed the ship. It is a floating splendor that has a lot to offer. We were in a mid ship deluxe balcony (D407) that had a trapezoidal shaped balcony (54 sq. ft.). Since we were mid ship, we experienced the lack of a central staircase. We learned to live with it and made appropriate adjustments as the situation required. For us, the lack of a central staircase was in no way a showstopper that some people have claimed.
The stateroom and bathroom were well designed and met all our needs. The entire ship's crew seemed to be proud of their ship and make everyone's cruise experience a pleasant experience.
The biggest complaint I had with the ship is the Internet system. For a modern high tech ship to have the equivalent of a dial-up modem Internet system is ridiculous. Hopefully Princess will be able to increase Internet performance to make it more passenger-usable.
D407 Deluxe Balcony - great room and location. Bigger balcony (54 sq. ft.) due to mid ship bulge. Plenty of storage. Bathroom are well designed with especially the big sink being a great feature. Only draw back on this specific larger balcony is that it catches the wind since the larger depth dimension is aft. Next time I would try to get an extended balcony that has the larger dimension forward. As a result of the wind, we were not able to have the champaign breakfast on the balcony when we were under way.