I like the automatic application concept, however I feel it should be a set it and forget it experience, which it used to be. A recent update redirects all emails from employers to an inbox that requires you to log into Massive. This is another mailbox that I now have to actively check. I'd prefer an alias system where emails are still sent to the Massive generated email address but those are forwarded to my actual email address.
Super-efficient idea with stunning implementation - I think Massive has a definitely promising future.