I have to say I find my PW2 a marked improvement over my Sony PRST-1. Which of course is to be expected as the Sony is pretty ancient now. However, the Kindle has not crashed or frozen once; the Sony software is so unstable that I always kept a paperclip handy when I was reading
It seems that Sony have no intention of patching the T1's software, maybe they just abandon older models once a new one comes out. Just like they do with their TV sets...