I personally have Netflix, Disney +, Stan, Apple Tv+ and Amazon Prime video… (As well as Fetch TV which is a bit different).
I mostly use Netflix, my husband mostly uses Stan, my son mostly uses Disney + (And ABCkids iview which is frankly fantastic) because of our different tastes in content, but I have used all of them for personal and family watching.
From an ease of use point of view, I definitely prefer Netflix. It gives great recommendations based on my viewing history, its easy to find what I want, and it plays seamlessly between my different devices (and its the only app of the lot I can access without any trouble on ALL of my devices, including my older 2nd Gen Apple TV). Having to AirPlay from another Apple device to the Apple TV for Disney + which is only supported on the newest iteration of the device is extremely annoying (first world problems).
Stan’s lack of ease changing between profiles, especially on the apple tv and fetch box, means my viewing history is clogged up with my husband’s crime and murder documentaries because he can’t be bothered changing the profile.
Price wise, Amazon Prime Video wins because theoretically, I’m not paying for it - I’m paying for the other elements of a Prime membership and it’s just a perk. BUT I’ve also barely used it, because it overlaps too much with the others for content and isn’t as easy to use.
Netflix and Stan are very very easy to cancel and restart, and to change plans instantly. Disney + was a bit harder.
Netflix wins for parental control - I have it set so that anything rated higher than G requires a pin code, as does switching between profiles. Disney + falls down massively on this one, I have to rely on the content controls from Apple’s Screen Time feature. My son can only access kids content on the kids profile on the app, but there is absolutely nothing stopping him from switching profiles into mine or my husband’s.
If I was only able to afford one of the multiple services I have, I would keep Netflix because of it’s wider variety of content that appeals to all members of my family.