Agreed -- I've exchanged many many emails with the developer to try to resolve my issues, but eventually gave up after trying for weeks to get it to sync a photos dir between my laptop and desktop (30,000 photos, 60GB).

Really hope they work it out one day, because I'd love the functionality for keeping dirs in sync w/o having to pay for the cloud portion; but right now its primary use case for me (dealing with dirs larger than I want stored in dropbox) appears to also be its Achilles' heel.