We booked this cruise solely because it was the Solstice - not the itinerary.
Cabins:
Narrow, but long. Too confining. Storage space a major problem if you are more than two people. Having the hall cupboard moved around the corner is ridiculous, as you lose space, and very difficult to get into - very poor design. The bathroom is really spacious - fabulous shower area. Storage is great, but I like to have somewhere to put my toothbrush. Balcony is wonderful. But, the cain is so narrow that room service could hardly get around the bed - almost dropped the tray. Not impressed at all.
Narrow - but long - storage limited, but bathroom a big plus.
Balcony great, but, oh, that narrow cabin - no, no , no.