It's worth it if you have a lot of "secondary" devices on your network (phones, tablets, smart tvs, game consoles, IOT devices) because then you get ad blocking

It's worth it if you have a lot of "secondary" devices on your network (phones, tablets, smart tvs, game consoles, IOT devices) because then you get ad blocking and no tracking for free on devices you couldn't otherwise effectively block. If you have a lot of those sorts of devices then it's definitely worth it. If you have an extra Raspberry Pi laying around, and are comfortable adjusting your DNS settings on your router, then it's definitely worth it too. I have PiHole running my DHCP server as well, so I can assign static IPs to my devices as well, which is nice if you have any servers running or like to SSH into devices.