The Remarkable 2 lives up to its name. It is a modern, beautiful device that delivers an incredible note taking experience. It feels like writing on paper, yet better as you can undo/redo things. It is a great size (around A5) and would be fantastic for taking notes in lectures or annotating PDF papers.
There is a remarkable feeling when you pick it up of calm and focus, that you certainly don't get with an iPad(!).
As an ebook reader it is a bit weak and slow, but the large screen size means you actually can read decent sized PDFs (like academic papers). And you can write on them.
Two things let it down (and why I ultimately decided to sell). The browsing experience is a bit slow and awkward, making it hard to quickly review notes. Secondly after some months you end up with a bunch of unstructured notes. I didn't really see you to address that (a problem of course with paper based solutions).
I think it is worthwhile reviewing things, as Socrates maybe said "the unexamined life is not worth living". Here I share some reviews that I think are of general interest. I try to keep things short and focused on what seems like the less obvious aspects. But I write many, many more using an app I made Micro Reviews. Using this app I capture reviews of all sorts of things, like books, films, TV, food, drinks, coffee and more. These reviews are largely intended to be private, notes to my future self. This guides future purchases and serves as a journal of experiences.
Micro Reviews uses Apple's iCloud to allow for data sync between devices, yet making sure your data remains private (unlike in many Apps the developer, in this case me, can never see it). With tags and categories you can keep your reviews organised. You can also search your reviews and export them to a CSV file (so you do things with the data in Excel).
Download Micro Reviews for iPhone, iPad and MacOS. (It is free!)
You can also learn more about Micro Reviews but why not just download it (it is free and a small install size).