in
https://www.mobileread.com/forums/sho...8&postcount=13 someone says (in german) that the contrast is really bad (but I didn't understand if it's only when the light is on), and it looks like it's confirmed on
http://www.lesen.net/wp-content/uplo...ed-595x295.jpg :
(BTW I've checked the contrast on the Kobo H2O at my local Fnac store yesterday and I can confirm that the contrast is really good)