The Perfect Viewer is at least getting close to perfection. He works quickly, scaled PDFs and images clean and makes reading a pleasure. Mainly I use it for comics in CBR or CBZ format and PDFs. Other software seems to me it is no longer in question. Books will be opened again at the point where the left off reading it (OK, that's standard for readers), you can set an arbitrary scaling and even activate an edge detection which detects the edge in the scanned pages and scaled the side of the actual content , That helped me a lot in a test preparation than I had photographed several chapters and then read on the tablet. But I like to donate a few euros, even if the reader is available free of charge without restriction per se.
