Not sure about the balcony room but we had a oceanview room and the room was a lot bigger than the NCL's one. There are plenty of storage and wardrobe too.
It is OV2 first year in the Caribean, look at OV1 reviews because they have done the Carribean for a number of years, and OV 2will be going to the same island.
Hi, I was in a BC room on OV2 at the beginning of September. As per the previous answer, the cabins are very spacious with lots of wardrobe and cupboard space. I'd been on two cruises before this one and thought the room itself spacious and extremely well thought out. However, having had a spacious balcony previously on a NCL cruise, the OV2 balcony was disappointing. It had one small wooden table and two small wooden chairs on it... and those took up most of the room! I had to shunt round one of the chairs to get out the door onto it. If you want a balcony to sit out comfortably on then this one might be disappointing, but if you mainly want to stand on it, admiring the views, it'll be fine.