[Mike_73]

The 505 didn't deal too good with pdfs, but with it being the only "in-store-available" reader in Germany, it was acceptable for me. File-loading times were very slow. Sometimes I thought that my reader had stopped working (it didn't take any button input either during that time). As the 505 only has reflow, it worked ok with text only pdfs, but not so much with formatted pdfs including pictures. I mostly converted pdfs consisting of text and pictures, charts, etc. to pictures (extract every page as jpg). There you can choose the compression. The smaller the picture of a page, the faster the load times. If the pictures are numbered properly (extracting usually puts numbers in proper order automatically into the file name), you can just start with picture 1 and then with the next button, you get to the next page. One main backdraw is that you cannot pan around on the page. You can zoom in, but with the zoomed pages being split into several "display-pages", it can happen that a text column gets split right in the middle which makes reading (due to the page refresh times) from skipping left/right almost impossible.

So my final word on this is:
pdfs worked really ok as text files or if extracted as jpg-pages (be carefull about compression, too much and it won't be readable, too little and the pages will load slow).