Hi Gracie,
first off, whatever level you book you will have a wonderful time! Donāt stress too much.
Iāve not been in a PH on Marina, but I was in one on the smaller ships. I can tell you everything in a PH on the larger ships will be bigger.
The walk in closet is an amenity that will be very useful on a 42 day cruise.
Having dinner in your suite is a great PH perk. Served by your butler, course by course, is heaven after a long day on shore or just because you feel like having your own private dining room.
Pre cruise dining reservations are available to PH first and you would also have the added benefit of a butler to assist if you would like addition ones.
Butlers on O are usually superb! I canāt remember when we ever had a butler that wasnāt attentive. Their job is to make your cruise experience the best it can be, but itās important to express your needs to them.
Iām sure others can make additional comments and give you ideas as to the best PH suite or concierge cabins.
good luck!
k