Don't worry about the balcony, Masaki. I was in an F class cabin last September, and I somehow managed to have the best cruise of my life regardless!!! Of course, what everyone is saying is true, a balcony in French Polynesia must be wonderful, if you can justify the tremendous cost differential for the upgrade. But thankfully, it is Radisson, and the public areas that you can relax in are not crowded, to say the least. You will have a wonderful time, I'm still swooning over my cruise.
Charlene