Here's my use case: as a scientist, I'm often in the position of needing to review multiple 20+ page grants or manuscripts, resulting in hundreds of pages at a time. I find it far easier to read closely and retain info when I can write directly on the documents, then circle back to collect my comments, vs typing directly. At a certain point, looking at reams of paper coming out of the printer made me feel slightly sick to my stomach. Plus, I appreciate that I'm not left with those stacks of paper sitting on my desk.

(Before someone does the inevitable HN calculation about why the materials used to make the Remarkable are far worse for the planet than all the trees killed to print grants - yes, you're probably right. YMMV.)

I had tried the various ipad and equivalents, and the RM's big advantage is that it feels like reading/writing on paper, mostly - something about the matte screen and stylus, though the stylus is sort of craptastic.

As others note, the software is clunky with annotations moving around on the page, and there's a bit of lag. But, I have yet to find anything better. I do wish there were an easy way to collect all the annotations in one place, but my handwriting as an MD is appallingly bad so that may be an impossible task.