I like the update.  It fixed gapless playback, which was my biggest complaint.  The sound is fine, IMHO.

Yes, that seems to be a common issue.  I have turned gapless playback off.  Hoping they resolve it with a firmware update.

I am new to the X3, just received mine this week.  I upgraded the firmware to 2.1 before doing anything else. I am using a Sandisk 64GB microSD card formatted to FAT32.   I loaded it with all my WMA and MP3 files and they seem to all play without issues. I then found some free FLAC HD files and...