@Willy Tärk I have the previous version the M96 plus, I can answer the landscape mode and the setting questions.
As for the settings, they stay saved for the PDF file you set it for, this is good as you don't want all the PDFs to have the same setting (based on my experience), so when I open book A and set the zooming and the reading settings, they are saved even when I switch to another book.
As for landscape mode, the books look WOW! really, very readable, also you will find that you don't need this for most books, if you apply margin cropping or just reflow the text, unfortunately reflow the text decrease the quality of the text (depending on the font type), but cropping with scrolling is always my friend, never failed me.
I still find myself thinking about replacing my 9.7" with a 13.3", mostly because I like to read in portrait mode (I think it's psychological), I'm trying to save a little and order an Onyx one, although I don't like the weight and the button position which is something I ranted a lot about to Booxter
, with Onyx the software reader and the note taking are really well done and fast + the service is excellent.
Hope this helps. If there was a way to attach photos to my post I would have snapped some agains a book or a newspaper to show you how the font looks.