It's quite good value, especially the 2-year plan, if you actually use all the stuff they offer. I got my family there, but they are still not to eager to integrate all there is into their routines.
Oh, that is 6 user with 3 terabyte of storage. average to 50$ per user per year. In where I live, that is like 2 meals outside per year, and cheaper than office 365 personal.
To me this is pretty good value, but I understand people are different. However, I cannot get them yet, as proton drive still don't have a linux client (or any client for that matter)...
As far as I know, tested, and using right now - rclone (through Round Sync) on Android support Proton drive. And it uses the same core as normal Linux rclone.
So yes, there is a client - rclone. And believe me, my own Nextcloud and
pronton drives are accessed through rclone. Most clients suck
Proton drive has windows and Android clients that work well. I'd love a Linux client for drive and for them to fix the photo upload issue on android, but eventually those things will come.