So far, it is a big disappointment.
1. I love Sony Reader aluminium body. It is one of the Sony Reader features that makes it superior to other flimsy plastic ebook readers.
2. I also like the reader's cover with hinges vs. new cover with plastic straps.
No upgrade for me this time. I had this feeling that my 650 would be like 505, i.e., a good model for many years before Sony makes another good one. I am afraid I guessed correctly.
They say that in every situation there is something positive. Saving money is the positive thing this time