Actual paper is pretty good, very cheap, has very good haptic feedback and readability, needs no subscription, doesn't restric you to certain pen manufacturers, you can still read the contents when the paper-mill ceases to exiet and has a very well proven track record when it comes to archival, accessability etc.

So if devices like these try to beat paper, even if the hardware is perfect, it comes down to software and how open it is. As a serious note-taker one would think this was the perfect device for me, but I checked out the software side of things and it did not convince me. Paper is still superior.