I have been a happy customer for some years, after using Google Apps for domains (paid) for more than half a decade. + You pay for the service, they are not mi

I have been a happy customer for some years, after using Google Apps for domains (paid) for more than half a decade. + You pay for the service, they are not mining your data. + When you have an issue, it is easy to talk to real humans. I had some feature requests, my case was transferred to one of their tech-people in no time. One of my feature requests was rolled out on their beta version in a couple of days. + They have a standards-conforming IMAP. So, it works much better with isync/mu4e/mutt/etc. + Fastmail is fast. + They are a big contributor to the open source Cyrus project. So a lot of their development ends up being available for everyone. + They support push notifications in Mail.app in iOS. (Not IMAP IDLE, real push notifications.) + subdomain addressing besides plus addresses. E.g. if my e-mail address is me@foobar.xyz I can give out me@quux.foobar.xyz without first creating a virtual host quux.foobar.xyz. It makes it easy to create custom addresses that are a bit less obvious than plus addressing. - The spam filter is not as good as Google's, even after training it for you personally. I regularly (usually once or twice a week) get spam or malware mails in my inbox. - The mobile app is acceptable, but not as the Google Mail app. It's basically their webmail in a web frame.