Having done a back to back cruise last year on the Harmony of the Seas I can say without reservation the Radiance was a far more enjoyable experience for two experienced cruisers in their mid(ish) 60's that don't relish being around over 1,000 kids. We tried the "mega ship as the destination" thing and the" ship within a ship suite level" thing, and it left us wanting. A lot. Then a destination wedding of friends on the Big Island made us reexamine RCI. This was a ten day cruise Vancouver to Honolulu (5 sea days then stops in Maui, Kauai, Hilo, Kona, Honolulu) with 18 more days to Sydney Australia for those doing the complete journey. We disembarked a day early in Kona since we would have had to fly back there for wedding the next day. Perfect timing. We'd been on the Radiance 10 years earlier and enjoyed her, so off we went.
What we loved:
The size of the ship and the number of passengers (just right)