She's referring to the way that the upper deck balconies are set back from the decks below ...same as all the Grand class ships. The complaint would be that the Balconies from the Aloha & Baja decks look directly down on the balconies on the Caribe & Dolphin decks ...and Caribe overlooks Dolphin.
If you want to avoid being "looked down upon" completely, get one on Aloha or Baja. On Caribe, the balconies are half-in half-out, if you're sitting on the outer half, the Baja balconies overlook you, if you sit on the innner half they don't (the inner half is under the overhanging Baja balcony. Caribe is the best deal as the balconies are twice the size.
There's no hiding on Dolphin deck balconies, you are overlooked from all 3 decks above.