We ate at Planks on the Caribbean Princess last month. We were the only ones in the place at 6:00 PM. It was the first night of the cruise, but on other nights I didn't see many either. The food was really good and VERY plentiful. Worth the $12. I just don't see how they can justify it, unless usage picks up. Plus it is more open than the other specialty restaurants onboard. You have some passengers just walking through from the WFM to the rear open deck. One stopped to take a picture from the window next to our table during the meal.