I was curious about that Disney Circle, boy they don’t really make it clear how content you don’t want to see is actually blocked.
The proof of the pudding is in the eating, I presume you have tested the controls, if you couldn’t find any content that you did not want to view after several hours of trying perhaps it’s worth it, if you are hoping it works, well that might not be the best approach.
pfBlocker has so many lists to block all type of contents, you can see the sites being blocked rather than generic terms.
While I know I am not their target customer I just think that 300$ can be better spent protecting the little children 
it can easily cover a modest router, switch and access point.