Sounds cool! I've been looking for a trustable Dropbox alternative so I don't have to manually encrypt the contents all the time. I'll download and try it out real q- > Make sure Java [...] is installed. :C
The only thing that one can be suspicious is whether they are transferring your key or not. But, at least they claim your data is safe and encrypted, while Dropbox, GDrive and similar services don't even pretend that they encrypt your data.
However, would still love to see an open source product like this that I can truly trust.