The UX was just way, way better.

That said, it's clearly been neglected since the Notion acquisition. IMO it has gotten actively worse/buggier, and the mobile app hasn't seemed to improve at all? I am not hopeful for its stewardship under Notion, given how clunky Notion is. The entire value prop of Cron is the lack of clunk.

I've switched to Amie (amie.co) and been really enjoying it. The aesthetic is a bit overly "playful" for my personal preferences but it's decidedly not-clunky, which is what I care about.

FWIW: Cron and Amie both sit on top of Google Calendar. They're just better frontends. So it's not really an "either-or" type decision.