I tried after they introduced the family plan, then gave up after a few months since most of the products were (at least then) extremely half baked and missing what were to me key features.

VPN was great, no issues. Calendar was pointless; no way to sync between Google calendar updates; you could import your calendar from Google, but as soon as someone changed an event Proton Calendar was out of sync and you wouldn’t know unless you check in on Google Calendar, thus making Proton Calender pointless.

Proton Pass seemed good except it launched with no way to use it on an Intel Mac. So unusable for me since one of my machines is an Intel Mac.

Drive I tried out but since there wasn’t a way to view photos like their competitors at the time I never did much with it.

Mail was good for years, but the family plan was enough for me to give up. There didn’t seem to be a way to share an email domain with my wife and have each of us be able to access an email on that domain (e.g. wife@example.com on her account and husband@example.com on my account).

I think Proton has good services once they mature but they had a spate of releasing half-baked products.