I used to use rocketbooks back in school, and they were quite nice. This was a few years ago so I can't comment on it now, but I really enjoyed it then. You could setup various places for it to save to and there were boxes at the bottom of the page I could check and say the first box was checked it got sent to drive, the second box could be like dropbox etc I had all mine set to different google drive folders for my classes. It was able to scan everything quite well and was honestly pretty seamless to me. I feel like there were more features but I can't remember now, even if there weren't though I still liked the organizational structure of it all.
I haven't had any issues with residue after a lot of use. The only thing to watch out for is writing too hard and leaving a scratch in the paper, but that's easy enough to avoid.