My Cool-er arrived this week, too.
I had put my Cool-er write-up on the old Cool-er thread.
Yes, I've downloaded the Elonex reader's manual and put it on my Cool-er! The Elonex manual isn't quite the same - the menu button is marked as a different one, and the + and - keys do font sizes for the Elonex reader, apparently.
Also on the Elonex site is a zip folder of 100 free books, which I have also downloaded. I don't think they are the same one hundred as on the Sony Reader CD, but I shall compare with that one later (the Sony isn't mine).
I have managed to crash my Cool-er a couple of times already by
1) trying out locked .prc files, and
2) pressing the + and - keys whilst trying to find out how to access other parts of menus, eg the pen/pencil/erase part of the number pad pop-up in Sudoku! The Sudoku is odd!
The page turn speed appears to be about the same as the Sony from a brief trial earlier.
I'm still very happy with it and I'm sure I'll find out more as I go along.