I got this little player to hopeless replace my dongles, and having a Fiio M3K before, I kinda knew what I was gonna have to deal with.
Fortunately, the echo mini sounds better and is nicer to look at.
The biggest issue I have so far is sorting my library. The player can't sort anything in the Playlist section, messes up tags and moves music to Unknown, even though my music is all tagged the same way. Going through the SD card itself is also a mess, because it sorts the folders by last modified date, and folders inside folders the same way. Not alphabetical, which is what I need. Example, I sorted Artist>Album (renamed the folder starting with year, then name). Also, any album with 10 or more tracks is a disaster, with the alphabetical sorting making track 10 before track 2, which I realize is just gonna happen, but still.
I am glad Fiio is working on firmwares often, and I hope the sorting gets taken care of, because I like this player so far.