I found the review helpful on this site!
If you scroll down to see all questions you go to a page where there are bars at the top (the home page). Drop down search type to Cruise Reviews. Then drop Cruise line to Grand Princess. The review is listed at the top, Princess cruises / Grand Princess by Berlit. Read through this and it gives a discription of the good and bad ones to stay in.
Hi, we have cruised on the Star Princess and the layout is the same, BC grade on Caribe deck mid ship I would recommend, the balconies are twice the size as the others, you have the advantage of being able to sit directly in the sun or sitting underneath the overhang from the balcony above. Have a great tim.
Being a balcony enthusiast I have noted on the latest Princess ships (although not having been on one) that unless you can pay the extra for a higher deck (always midships) cabin, you are overlooked by the higher cabins. Why these ships were designed as though looking at a triangle from the front or rear I will never understand. One likes to have one's privacy, but shouldn't have to pay extra for it.
If you are thinking of a balcony cabin you might like to know that they tiered so that unless you are on a high deck you will be overlooked from above by every deck abov.
We sailed on the Grand Princess a few years ago. I agree with what the other respondents have said about the higher the better so you are not overlooked, but I would not go for anything on the top cabin deck (Aloha, I think) as there is an overhang from the decks above which stops the sun getting to the balcony. There is also some noise from the deck above. I have been told that the Cabins/Suites rights at the rear of the ship are good for space.
We cruised on Grand Princess in the Caribbean in March with balcony cabin on Aloha deck. There was no problem with noise from deck above (and I am very noise sensitive) and how much sun you got depended on the ships position at any given time of day, ie sailing north, south, east or west and which side of the ship your cabin is on. The only cabins I would try to avoid are those immediatly facing the lift/stair areas or you may be disturbed by people coming and going.
I would A215 if you want a balcony that is not overlooked, the other lower decks are partially overlooked (but in the shade most of the time) by the cabins above, but this is the price you pay for bigger balcony's that give the opton of being in the sun (but overlooked) or in the shade (not Overlooked). Mid ships have been nearly always in demand (less movement from the ship) but you get noise from the lifts/stairs, back can also be noisy from the engine vibration. The lower decks are usually suites not balcony staterooms because the ships are wider and offer more room in the cabins.
D610, Dolphin deck has the bigest rooms due to the balconies stepping in as they go up. i.e. everyone has sky above their balcony. It is also midship near enough so not too far to go for either end of the ship.