The Sony PRS-505 has been my first ebook-Reader. I loved it, but since some months it gives me technical problems all the time and I never liked the Software and the Firmware. I keep it mainly for "nostalgic" reasons.
The PRS-700 and even more the PRS-600 have been a big mistake to be bought. I bought them mainly for note-taking, but they turned out not to meet my requirements at all and I never liked the screens of those devices, could hardly read with them (the PRS-700 was in my case better for me, as the lights helped me at least somehow to solve the screen-issues. Without the lights on I was never able to read on this device and so the PRS-600 was a real big mistake to buy, hoping the screen might be better than the screen of the PRS-700 but failed). I'll try to sell those devices, but so far I still own them, that's why I've listed them.
The iPhone is in my case not a device I use to read with for many hours, but it's quite nice for short-time-reading really everywhere, even if I don't have one of my e-ink-devices with me. And it helped me out when my PRS-505 crashed again in the middle of a book and with no Computer around myself to solve the problem.
In the meantime I decided to buy the KindleDX and I really, really LOVE it. I love the screen-size, the wonderful screen (even much better than the screen of the PRS-505), the perfect annotation-function etc., etc. The KindleDX now is my main device and I guess it will stay to be that for quite a while.
