We have cruised before with NCL on the Star and a few times with RCCL on the epic, independence & Rhapsody x 2 along with P&O in Australia.
I must admit I was quite disappointed with this ship. It is a very strange design, I am almost convinced the person who designed this ship had no experience with cruise ships, maybe cargo ships.
We stayed in a 2 bedroom suite that had its own pool area and restaurants and had our two teenage boys in an outside cabin on level 12, 4 below us. The dedicated area on levels 16 & 17 for people staying in suites is quite ok, only problem it is a bit quite and if you are not staying in these units you cannot enter this area, this made it difficult for our boys to come up to this area to see us. I had to tell the people I want access for my boys and they were reluctant to let me, even though they assured me it would be ok before I booked via the an agent.