-There is some incorrect information in this review. There is no other device that can sync your documents and notebook so easy. You close your document/notebook you are working on, and a few seconds later it is available on your PC/Mobiles and this works the other way around (Remarkable Connect Cloud). Also if you connect the Remarkable via USB to your PC, and via you browser you get access to all your Documents/Notebooks. There is no reason to use email, unless you send your Notebook/Documents to somebody else. Also with Connect you can sync your documents with Google Drive, Dropbox and OneDrive. With Remarkable Connect solution, you don't need to even think about, it is auto-synced to all your devices. The only downside with the Connect solutions is like 2.9$ / month, after 100 days free trial.
-Also the canvas is not restricted to the screen size (if that is what you mean). You can drag with 2 fingers horizontal and vertical, to expand your canvas to the right and to the bottom. If you make a mind map or a drawing, you don't need to worry, if it doesn't fit on the screen. This is also working when you make handwrite notes or PDF's, when you want to add notes.