I refuse to use parental controls, because I know my kids will find a way around it (I would). I instead set firm rules with relatively severe consequences if they're not followed. Once I login to the PC, there's no time limit, content filters, etc.

That said, my youngest kept getting into the Switch and messing up peoples' saves, so I put a parental lock on it, but I told my older kids the code and told them I trust them with it. If they abuse their time with it, they lose the console privilege.

It seems to be working. I'll probably give them a PC soon since they're doing a decent job stopping when their timer goes off (they set the timer according to our rules). We have limits (2hr max per day, must be done with homework, they earn time by reading), but again, I don't enforce them with software, I enforce them with the threat of loss of privileges.