Hrmmm. Maybe I'm not much of a developer, but domain setup, FTP setup, etc. comprise about 0.00001% of the time I put into a project. It looks like a really nice UI for writing, but seems like more solution than there is problem at first glance...
They are solving a problem that doesn't exist. Coding from localhost is fucking fantastic.
As far as I'm concerned anything extra added into the mix is too much. I love my editor, browser and DB management app. I mean, best of luck to them but I just couldn't work with it.