UI looks like a Transmit ripoff express classic to me, which I find a bit off-putting, even if it does look 'attractive' : why couldn't they come up with their own?
On the technical side, nothing to write home about. A mediocre FTP/SFTP app. Far far better options out there, and some even cost less, so I'm not sure why FIBLab think it's worthwhile making this, never mind why someone would buy it.