It is OK for reading books in pdf format (although not as good as in EPUB format), but for technical books with illustrations or textbooks it doesn't quite cut it. (ereaderspotlight.com)
The headline implies I'll no longer be able to read my pdf technical books on the device. (goodereader.com)
It deals neatly with this topic, in his case with regard to the challenges of setting technical books in ebook formats. (activitypress.com)