I am considering to do it, but I still have a few questions:
1) Do I understand it correctly that it is indeed also possible to return to the original iRiver firmware if needed, by making a backup first of the ROM ?
2) After flashing: How do you update Rockbox with a more recent build ?
Although I read the instructions, it's still not completely clear to me. Should I only download the newer build and unzip it to my H120, replacing the existing files ? Or should I flash again ?