Oh sorry! I mostly hated their VPN app on linux: it’s not like their VPN is a brand new service and still they can’t manage to make it work painlessly. Switched to Mullvad and now I can forget to even have a VPN. And also the Android mail app could be better indeed.
All in all it seems to me that Proton makes sense if you can have the entire package: but once you have problems with one or more of their services (VPN, email) and need to look elsewhere, then you can find good alternatives at cheaper prices.
Did you try their VPN on linux? Bc I did