I tried it and never could get it to work. there was no invitation to ask questions or comfortable way to leave feedback so i just abandoned and went back to the order history/Import-CSV Add-On which is way easier and does what I want.
It’s a bit more complicated than the Add-On. If it works as designed, it might be about the same amount of fiddling once you get it set up. Since I never got it going, I didn’t find out.
I would not recommend it. The Add-On is free and comes with unending fabulous support. I’d send my friends to it!