I have a sony reader I use when I am not reading on an actual computer.
As for proprietary format, you can buy an SD card and just slot that in the expander, adding new books then becomes just a amtter of putting rtf or pdf files
directly on the sd card without any other fuss.
Display is very readable even in low light, battery life is un-matched. It doesn't drain any use except on page-change, so battery life is actually rated
in pages as opposed to hours of use.
The reader itself is also much lighter weight than any lcd-based one as well, if that matters to you.
As for proprietary format, you can buy an SD card and just slot that in the expander, adding new books then becomes just a amtter of putting rtf or pdf files
directly on the sd card without any other fuss.
Display is very readable even in low light, battery life is un-matched. It doesn't drain any use except on page-change, so battery life is actually rated
in pages as opposed to hours of use.
The reader itself is also much lighter weight than any lcd-based one as well, if that matters to you.