I’d agree the OPNsense UI is probably more intuitive if you’ve never touched PFSense but I found the OPNsense UI difficult coming from many years of PF.
I’ve been using an R210ii with PFSense for like 8 years now. It’s been rock solid and only sips like 20 watts.
To be fair, if someone made a blowjob machine that required an OS, it would probably be Linux. Just sayin.