It’s not really an email tool, because all these new features make it non compatible with your classic webmail. More than emailing tool, it’s more a new way of collaborate, with messages editable in real time which we can integrate all the kind of content (videos, images, etc…)
This is a tool which could be very interesting in order to collaborate with a small group.
If you want to know more about it, I suggest you to read this complete guide quite interesting.
So if you feel like to exchange your emails for “waves”, leave a comment here and I will give you an invitation as soon as possible.