I tried it for about 5 minutes and then downgraded back to ole good 1.20.
As far as I got, I noticed these bugs: each time it actualized the files (like, unplugging the Usb) it hanged and had to be reseted (Possibly an issue with some mp3 names? Anyway, the older version didn't have that)
The thumbnail recognition for roms appear to work fine, but it read all the files in subdirectories to a common list; there is an option to go back to the directories system, but then the files on them won't show... So, it need a little more work, am afraid.