I have been on one Princess cruise (15 day) this last April. I was looking at another cruise later this year. We did not book two cabins, but I was searching for pricing (Mini-Suite, Premier Package) and it was coming up as $11K+. I searched again the next day and it was $8K. I immediately booked it. I didn't wait for a PVP. The next day, the same category (the room next to the one I booked) was back up to $11K. I did not ask why, I just jumped on it and was glad I did. This was a couple of months ago. It is still at the $11K price today. I did get small OBC casino credit from a promotion, but there is no mention of a room discount. The deposit was still $800 ea., but I had a FCD that made it $100 ea. I think i just "got lucky" with being online at the right time.