Opinions about ProtonMail?

I want to dump my yahoo email accounts and am considering Proton Mail. This is for ordinary daily personal use, no business or organization-related stuff. Looks like their free account would be adequate for my purposes.

If you use Proton Mail: how has your experience been? What do you like/dislike? They have a tool for transferring/importing a yahoo acct into proton acct–if you used this tool, did it work OK?

Thanks for info–

Free Protonmail is fine if you do not need too much storage (I think you get 1 GB right now). You get Mail, Calendar, Drive, and VPN.

I’ve been using Proton’s free VPN for months with no problems, seems stable and reliable–wondering about process of importing yahoo emails into protonmail using their import tool–