It's totally worth it, in my experience. I've been using ProtonVPN on all my devices for years now, which was the main service that got me on Proton. Every year that I stick with them, they give me 10 GB of extra storage space in Proton Drive.
I wasn't sold on their mail, until I learned I can create unlimited aliases for websites. So for creating an Amazon account, it might generate an email like "[email protected]", which will forward to my Proton inbox. Anytime I get an email sent to that address that's NOT from Amazon, I know they sold my info, and I can close the alias anytime to end all junk mail going through it.
I just retired from the US military a couple years ago, and it's been rather nice because our govt computers are so locked down, we weren't allowed to bring any electronic devices into our offices, for fear that someone might steal classified information. Also, our computers were locked down so you couldn't just install anything on them. You had to go through the IT guys to install things. That was my job in the military; I was the IT guy.
Now that I'm retired, I can actually use third party programs like Proton Pass to make complex passwords for everything. I couldn't use it in the military. We had to use unique, complicated passwords for every individual account, and we couldn't write them down. I'm super grateful for Proton Pass. It's my first password manager, so I can't compare it to others, like Bitwarden.
I'm not a huge fan of their calendar yet. I've been using Google and Microsoft Outlook's calendars for years now, and I like that I can make my calendar events different colors, so I can differentiate between types of events real quick. I just logged into Proton's calendar and was met with a pop-up stating that I can now use colors. So maybe I'll adjust to using it.
I'm trying to de-Google myself right now, and Proton Unlimited is giving me the options I need to remove myself completely from Google's stranglehold. So far, I'm proudly advocating it for all my friends and family, even if you just use the free account.