Hi! I have been using Fastmail for the last 2 years and love it!

I don't use the web interface much, instead I use Apple's Mail.app. My only issue is that external email accounts (gmail) take some time to be fetched periodically. When I open the web interface and click on the tag, it instantly pulls the new mail in from the external account, but if I fetch in the Mail.app, it doesn't refresh the external accounts. So, for things that have a very short time period (confirmation codes), I still end up needing to open the web interface. I wonder if this would still be the case with the new desktop app?

I will take some time to set it up over the next days and try it out!