I've been using the beta for a while now.

It's still (obviously) a beta, so you will get frustrated every so often if you're using it daily. I love mailbox and I'm still using the beta, but I usually yell at it (mentally or out loud) once a day, so just beware!

I would love to use this, I really would. The UI is great.

But I can't get over the fact that all of my emails would go through a third-party service. It's just too much to ask these days.

As privacy is a major issue with my livelihood and my business, I think I'll avoid anything with Dropbox. Especially when it's baked in.

I hope that is a way to track all the changes the apps are going through. Would love to see its evolution, from beta to stable.