The Novel Personal eReader shipped with a first generation Sipix screen. This is literally the worst epaper screen on the market. The background of the screen is a light gray, not white. Do you want to know how gray the screen is? Last week I took a picture that compared this ereader with my original Kindle and the Kindle had a whiter screen. Think about all the complaints about the Kindle's screen; this Sipix screen is worse. They really should have held the technology for another year or so.
I don't think anyone should buy an ereader that uses this screen. You will have a much better experience with an E-ink screen. And yes, my recommendation applies to all Sipix screens. I've heard a similar complaint about the Thalia Oyo (it also has a Sipix screen). Someone even took a picture which shows the grayness of the screen.