Ok- writing with experience of successes now! Whilst the initial rip may be quite quick, phile audio takes a while to convert the aiff files to your preferred formats. So, don't turn off your computer until the temp folder is empty. (After copying about 20 CDs last night I left my laptop on all night and found the temp folder empty in the morning.)
Sometimes, the app seems to lose the destination folder and the converted files don't arrive. I work round this by creating a new folder and pointing the app to this. It's also useful for checking your work as you go along without ploughing through countless titles.