Just completed my 5th Queen Mary II westbound crossing (had done the same many years ago on the QE II one time as well)
While the experience can never compare to the QE II I have enjoyed my crossings, as I love being at sea.
Last year we were upgraded to the Princess Grill, and the experience was superb, so we booked Princess for this year and were upgraded to Queens.
the queens grill cabin was spacious, great closet and storage space, good size
bathroom with a Jacuzzi,(the tub could be a problem for older people, as it is a high step to get in and the shower is in the tub. Balcony was good size as well, no problems there