I'm interested in people's experiences switching from Google Calendar to Fastmail Calendar. Is Fastmail a good replacement? It sounds like basic calendar even

I'm interested in people's experiences switching from Google Calendar to Fastmail Calendar. Is Fastmail a good replacement? It sounds like basic calendar events will be unchanged by this (though I'm not completely clear on that), but Google Calendar is the only Google service I'm using regularly and I wouldn't mind getting off it.