I've tried rocketbook with some limited success. You have to remember to snap a picture of the page to get it synced to onenote or Dropbox or other sources.
I'm thinking more like remarkable or the Sony one. Watched some vids last night they look lackluster at best pumping them full of features nobody asked for to hide the fact they don't do the one thing well.
I'd pay double what those cost for an eink note taking tablet that lets me handwrite normally (lefty), erase, save and nothing more.
As long as it's response time was near instant and the pen nibs didn't wear out or were at least commoditized enough I could use any brand.
The Sony comes close, but im allergic and besides there is no way I'm dropping $600 just so I get to carry micro USB again.