Comment by AdmiralAsshat

Looks cool, but the wiki calls out that it can't sync reading progress between devices. Which, I understand--how Kobo does it is probably not well-documented. But without that, the solution doesn't seem any better than the Dropbox support with certain Kobo models. It would only be of interest to me if I could sync e.g. my Sage before putting it down and pick up my Clara somewhere else and be able to find my place in the books I'm currently reading.

Not even the Dropbox integration does this yet with sideloaded books, though. I think KOReader might be the only one that has pulled it off so far.