I have not used it but I do know a bit about it having talked with the Sagem Wireless during the development. I was going to try to import it but they wanted to stay out of this market.
It's not Eink but SiPix which is slightly different tech, grayer back ground but has the capacitive layer built onto the display at factory. Overall its a very nice device, well made and quite quick.
The Fnac I believe only comes in 3g but the version sold under the OYO brand comes in wifi only version
there may be english menus in the german version but I cant find anything about menu choice on the FNAC version