Don't have pics of the waterview but have had them. Usually a view of the lake.
The downfall is to see it you have to leave your curtains open and the walkway is right outside your room. So basically to see the lake, everyone else gets to see your room.
If you are going to spend the extra on the waterview, I would spend it on the preferred location. Have done that as well and it is SOOO nice being right near the main pool and food court/shop.
We were in Martinique both times (when we did preferred) and had a beach right in front of the room with hammocks and 30 sec walk to main building. Would definitely do it again if we were stay at CBR.
As for CBR, LOVE IT! Great relaxing resort no matter what building you have. Stayed in Trinidad South and loved that too! Steel drums, beaches, hammocks. A vacation in a vacation.
Enjoy