Thanks a lot, I couldn't find any feedback from PC members on TripAdvisor.
So back in 2011 20k points were needed for a redemption, and now 30k, but I don't know how much they were in 2012 prior to the latest devaluation. However, I think I'll pay for it as it's not too expensive (JPY 11000) on flexible rate, and for the same price breakfast can be included. I've read it's pretty bad, but well, it's good to be given this (free) option.