Haven't tried any other similar product (except the pro version), but I have the Remarkable 2 and in my experience it's pretty good as an e reader as well. Maybe expensive for just using it as an e-reader but you can also use it as a note taking device. It's pretty big but still really thin and light, so it's a pretty good reading experience especially if you have bigger hands, some people may find it too big as an e-reader tho, but I really like the size.

One recommendation I can make is that if you are interested in it, if you have the money consider the pro version. If notetaking matters to you, the little I experienced writing on the pro version was so much better. The pen is much better as well as the tracking. My version tends to be off by about a millimeter at some places and the edges. This becomes extremely frustrating when you're trying to e.g. dot the i-s and you keep missing where you want to write. From what I saw, the pro version is much better at this and is in colour.