This article summary missed the most important piece from the site in my opinion: "Coming April 2020." The makers of this new email service will be sending out invites soon to anyone who sends them an email, and are trying to collect stories of what users think is good and bad about email. It is difficult to determine how good this new service might be with the limited summary of how they plan to modernize email.

Here's a decent engadget review and associated video of this mouse.

I personally just use ZoneEdit, a DNS provider, to forward email from my domain to my Gmail account.