4.5 Best for useability bobmid | 20/07/2010 | See all bobmid's reviews (2) I got my PRS-505 soon after they were launched. It just works. The music quality is very good too.Recently I had a look at both the 300 and 600 and have decided to stay with my 505. Why?The next page button is the one you use the most and on the 505 there are two of them that are in exactly the right place whether I am sitting up and reading or lying down for a quick read before bed.On the newer models they have moved the button. It may not sound like a big issue but if your book has 1000 pages then this is the button you will have to press 1000 times.If you want a Sony eReader I would always go for this one.When it finally bites the dust I will go hunting for another make that has the buttons in the right place. Unless the 505 is still available, then I will get another one.