Originally Posted by vxf
I agree with dorino on everything but the suggestion to skip SONY's software.
If you don't plan on exporting, storing or viewing on your PC your annotations, than I agree - just go with Calibre.
But if you need your annotations, you need SONY's software. In which case, I would recommend installing both (Calibre and SONY's Library). Just don't use them at the same time, as many posts wisely suggest.
And no, PDFs are not bad. In Landscape mode, of course. Most are readable without any text resizing/zooming - at most, by using the margin crop of the reader. Some require zooming, but those are rare exceptions, at least in my experience (I download tons of PDFs from JSTOR and SSRN).
The Sony software isn't required for taking annotations off. One can manually do that, though it easier through the software. I prefer not to use the software, though.