I have stayed in cabin 12000 on a four night Dream cruise several years ago. Loved this cabin and verandah and would book it again as my first choice cabin of the cat T cabins. We found the cabin and the verandah to be very private and quiet. On the verandah there is a huge area that is covered and private from those above you. Honestly, we only heard people above us a once in the entire four days. Yes, we did hear our neighbors on occasion on their verandah but that can happen regardless of which cabin you stay in as people enjoy their verandahs. I wouldn't say either set of neighbors was extremely loud and we we're never bothered by them making noise while they used the Jacuzzi on their verandah.
Yes, the view is not straight down but we loved our view from this verandah. I loved sitting outside with a massive ocean view. We had late dining and each evening we would get drinks and appetizers from the concierges lounge and sit out on our deck to watch sunset. We also found that we used the verandah in this cabin far more then we have ever used our verandahs on any other cruise. In addition, the cabin also has floor to ceiling windows that run the entire length of the back from the living room to the dining area. It was so nice to have a breathtaking view even as you relaxed inside the cabin.
I also liked that the stateroom had the extra hall as we never heard any noise outside our cabin.
Clearly, pick which ever cabin you will be happiest with for your needs. I just thought I would share our experience staying in cabin 12000.