We have just returned from a Transatlantic crossing on QM2 and had a wonderful time. I would like to advise any woman thinking about this trip, that clothes for during the day can be as casual as you wish - i worried for weeks prior to leaving about what to take and took far too many 'dressy' outfits for day time - i was very comfortable in casual linen trousers and nice tops. My Formal outfits fitted the bill perfectly!
Only small and i mean very small complaint is the Embarkation and Disembarkation - altho this was 1st time ship had been berthed at Bayonne, so everyone had to allow for teething problems and Cunard got it so right by having wonderful 'treats' delivered to our Hotel in New York, with no contact from ourselves.
We were celebrating our 25th Wedding Anniversary and had Champagne, Flowers, Cards etc delivered to room from Cunard - lovely touch!