I share your review 1000x. I pretty much exclusively read PDFs, mostly OCRd but sometimes not. reMarkable is the only ereader I’ve ever found usable. I do agree that the subscription model feels tacked on, but there’s good tooling otherwise (I don’t use the cloud service myself). I highly recommend it as an ereader if you want one predominantly for research, actively taking notes on your documents at home and on-the-go while wanting to sync that with your PC note apparatus.