I use the device for the very same purpose and I am VERY satisfied!
Though, I have not tried wifiing with the device - I rather take the SD card out, plug into the laptop, do the sync with Total Commander or Free Commander, and plug the SD card back. It is also good because it makes a backup of my scribblings and highlights!
And I have also created some empty PDFs (50 pages long each), and use it as a notepad, and it is amazing! I just had a presentation and instad of creating a PPT I just sketched my slides by hand with the pen, and everybody was impressed!