I have one, it is ok but I have only had it for a few months. The price is silly for what it is and I would not buy one with my own money.
It is good for having all your notes in one place and provided you pay attention to file naming, it is easy to find what you are looking for. My writing is pretty rough so I haven't spent much time with OCR, but suspect it will be too unreliable to be useful. Cloud backup is good and battery life fine.
I hope that helps.