I bought one during the kickstarter, mostly for note taking; but also as a ereader & perhaps drawing tool. - For note taking: I prefer a simple paper notebook, as my notes are more procedural. I don't really look back often. It's fine. Just not better then paper for note taking imo. - As a e-reader, it is absolute dog shit. period. - If you are not artistic, this will not change that - The subscription model is terrible, I've cancelled my 'grandfathered' account and tried to sell my rm2 over it. - Currently using it as exceedingly expensive notepad, no cloud crap etc. - Battery life is kinda meh, either you have it go to standby and have to wait a few second to use it. Or it is constantly empty when you want to use it. Not the eInk experience I had expected.
You can install custom software, as it is not locked down, that might solve some of these issues. I haven't tried. For me, this is just a notepad. And not a great one at that. I use it mainly because I paid for it tbh.
I have several friend that have one too and enjoy it much more, but this how I experienced it, ymmv obviously.