Last week I experienced powering the console up, getting just the xmb background. No icons. Controller did respond. Home button worked. After three restarts I got the familiar "rebuilding system" message and it booted properly. No indication of problems the previous evening. Scary. Needs more stability updates.
Picked off from my 31 hour mark a little bit before Somnom woods at release. Finished the game over the past three days at 46 hours. Dragged on and on. Died a few times on the last bosses so I decided to finish them on easy mode. It was worth it to play through it but that game could've been 25 hours shorter.