Let me add to your content:
Forkosigan has assured that the update 15.2 is to come before the end of May, as soon as the new PB302 firmware is bug-free.
I use 15.1, and it crashes eventually, but I don't pay much heed to it. Come to think of it, it's like if your pbook closes in the middle of reading. An annoyance, but nothing serious.