Second cruise (First was also Explorer). Cruised wih my 5yo and myself.
Cabin: 9205 Window cabin with unobstructed view, and a queen bed. This room had more than enough space for our 2x suitcases and drawer space for all our clothes. The suitcases could fit under the bed, but there was plenty of space in the wardrobe for them to stand in so no need. Tv and fridge in room were used daily and both great. My 5yo packed a few toys and there was plenty of space for him to play with them on the ground in our room while watching tv in the evening.
Ship: Becuase we done the Chrsitmas cruise, the ship was decorated beautifully with Christmas trees / decorations / gingerbread houses all over the place. We even had fake snow!