My wife bought me this Harmony cartridge for my Atari video console system as a birthday present gadget. Like the Mega-Cart for VIC 20, it boots a friendly front-end menu for all the cartridge images stored within it. But unlike the pre-installed ROM in Mega-Cart, Harmony sports a SD flash memory reader and allows me to copy and customize Atari 2600 cartridge images onto it. And I am pleased to report the 2600 images even work on the more advanced Atari 7800 console, too.
Now what to do with the 80+ cartridges I own?