I still have 2 invites left if anyone wants to test out Inbox. I'm starting to like it more and more. However, my only gripe that remains is that they didn't include a dedicated delete button/selection from the Trash can. As it stands right now, once you're "Done," with a particular email, you can send it to the Trash but then you have to go back to either gmail.com or the gmail app/iPhone mail app to actually delete the email permanently. Maybe this is a feature they will include in a future update (I hope so). But again it's not too bad of an app to use in my opinion. If you would like an invite just PM me with your gmail address.