I tried inbox a while ago and stopped using it shortly after. I really dislike the interface since It seems really cluttered and distracts from the simple form of communication that e-mail should be IMHO. I do like the function to snooze an e-mail for a specific location, but not enough to keep using Inbox.
I really prefer Mailbox by Dropbox, since the interface is much cleaner and it functions pretty much identically.
First they killed the chat by bringing up hangouts, now killing the idea of email by "inbox".
Google, killing the net since lately (:
personal mail server for ever! ;)
I'm not even sure this is a new thing but I do have invites ;)
Inbox was released in October 2014, so it's old thing and you can get invite just by requesting it on inbox site.
Bummer, they made me feel really special so my compliments to their copy writers.