I've tried the Boogie Board Sync in the past and it really is write-only. The price is nice and they're honest about its features. Still, I really missed not being able to page through earlier notes.
Also, the feel of writing on it is okay but not good or great.
Had it been able to show earlier notes I would have recommended it to everyone looking for a digital notebook.
I haven't Bluetooth'd yet, but plug it in and copy from its drive of single-page PDFs (with InkML?).
https://amzn.com/B00E8CIGCA $99.47