Comment by chias

I made the same switch, and have also loved it. I also much prefer the interface to Gmail's. If you've got one account and want to configure a bunch of addresses to go to the same inbox, it's a no brainer. But if you're actually maintaining multiple users, it is not cheap.

Side note it was weird: I found actually signing up to Fastmail was physically difficult. Like, pushing the button. Once I had the account, it was super easy and felt like floating downstream.