To add some balance, I use them for my business and my family (3 domains, 6 users) and find it works perfectly. Even my father is happy after switching because the UI is much more consistent across his devices than all the various mail clients he used before (Apple mail, iOS mail, provider's crap webmail)!
Even so, I encourage everyone to first try the free tier to see if they like it (ie the lack of caldav/carddav and how much you're tied to their own apps for the encryption, yes I known about the bridge, yes I also want a Linux client, or better yet, an api or rsync endpoint). Even the free versions have 0 ads and don't use your data, perfect to see what you're getting into. What a nice company, I happily pay them for a better internet indeed.
Even so, I encourage everyone to first try the free tier to see if they like it (ie the lack of caldav/carddav and how much you're tied to their own apps for the encryption, yes I known about the bridge, yes I also want a Linux client, or better yet, an api or rsync endpoint). Even the free versions have 0 ads and don't use your data, perfect to see what you're getting into. What a nice company, I happily pay them for a better internet indeed.