They don't work very well unfortunately. They use a MD5 checksum to verify your game, which in the surface sounds great, until you realize that a lot of the newer setups (EmuDeck) for roms will offer to compress them into .7zip files (and other types) and then suddenly none of the games are recognized as the original MD5 checksum is different. So you cant compress any game, and not sure if they work with .m3u lists and doubt it will because most likely it'll want to .MD5 checksum the .m3u file.

Also, it needs to have an Internet connection the entire time, so this kills more portable device usage unless you are at home/4-5G. They claim it's to prevent people from cheating the achievement, but in the end if just becomes another block in usability.