I personally have a RocketBook 1100. A black & white screen but fairly large. I find it very pleasant to read with, mainly because of the size of the screen which, simply said, is good. I do read on my pocketpc but the rocketbook is very nice too.
That said, I would not recommend it simply because if you buy one, you do not know which version you get. Only the latest ones can run home-made content.