ok so far Ive backed up three different SNES cartridges. it does exactly what it is supposed to do and the process is extremely fast and painless.

in the manual it says there is a risk that your save files can accidently be deleted while using the device so that scares me somewhat but I am currently sitting at 3 for 3 with the success rate so I dont think i have much to worry about. i am sure he wrote that in there to avoid potential lawsuits and the actual chance of it happening is less than 1%.

I dont plan on replacing any more batteries until my save files get erased due to battery death. The worst that can happen now is instead of having to play through 100% of the progress I lost, I only have to play through 10-20% of unsaved progress to go back to my last backed up save file.

I havent tried any Genesis games yet but I am sure the process will be similar. from what it sounds like, hacked and repro carts dont work but since I dont have any, it doesnt really affect me.

this product gets my full recommendation as of right now. if anything goes wrong or I lose my data or a cartridge ROM becomes corrupt, you guys will be the first to know