i am using the paid version. i find this app is very good for listening to single huge audiobook files as well as audiobooks divided into many multiple files since it scans better through the long files than the built-in iTouch music app and it stitches together multi-file audiobooks seamlessly and keeps track of where you last listened on multiple audiobooks. i also like the skip forward/back features and the sleep timer. i wish the device volume buttons could be set to pause since i have an iTouch not an iPhone with headset pause and the Time Machine function is an utter mystery to me - user selected bookmarks would be much much more useful to me.
Simonsezno about Audiobook & Podcast Player, v1.1