So it's like Rockbox then in terms of song navigation?
Some people in the AK120 thread claim there's a difference in sound quality between FLAC and WAV. If that's the case, the AK120 does a poor job of unzipping the FLAC file. I ain't going to use WAV on a portable media player, not to mention the complete lack of file tags.
In the same thread, some people claim there's a difference in audio quality between a 64 GB SD card and a 32 GB one. WTF.