I switched over this year on a paid plan, still on trial period, may switch back to PrivateEmail. PrivateEmail was kinda sketchy security wise (e.g. you can turn on MFA but SMTP has no MFA and same password) but never had any problems there.

So far not being able to send mail from arbitrary addresses on my domain without registering them first is annoying because of the 15 address limit they have in place. If I try it over SMTP without registering the address first I get an error back. And the bridge app is breaking inline attachments for me from a Python script sending mails over SMTP daily. The outage is not helping with the quite long downtime.

UI wise it works fine I guess? getting to settings has been annoying. Only use the web UI as the client app used some ridiculous amounts of RAM but I think they're mostly the same

We use it for corporate mail ... but we all still have google accounts to access google cloud, do oauth to other services, and to manage our calendars.

The UI is clunky and extremely slow. A sidecar app is required to use a local mail client (which is actually quite neat, as it runs a local proxy over a secure tunnel) but it is a hurdle nonetheless

I would not use it for corporate purposes or anything other than a situation where you value 'privacy' over all else.