As a general rule, I don’t like small eReaders (for which my primary experience is my phone). I find I read much less when using them, because the act of turning a page tricks my brain into thinking I’ve made more progress than I have. Consequently, it makes even short reading sessions feel like a chore.
That said, I think I would love this thing for one very specific use case: backpacking! Space is always at a premium, and I’ve long lamented the Kobo Mini never got a frontlit model.