I've been using OPNSense for last couple of years and it has been pretty stable for me.OPNsense 19.1 is little different in some of the settings, just type or paste the ip address or hostname in Content field and hit space after. On this new release, it enabled us to add multiple ip addresses or multiple hostnames at once.For ex: so lets say you have txt file which contains few or a lot of hostnames, you can literally paste it in content field. Which is much easier than before.