The thing's fantastic. I don't even mind the low dpi, or the delayed responsiveness (it's not slower than turning a paper page). I bring it with me and read anywhere. It does not have the attention seeking alerts nor the eye-straining of a back-lighted smartphone.
There's under a dozen simultaneous books I'm reading at any given time, spanning both fiction and non-fiction, and have already put 1500+ hours on it (the device has nifty time tracking stats!). To me it's about the niftiest piece of consumer tech the industry has put out the past two decades.