I don't use Fortinet, and haven't for quite some time. While Fortinet has many good points, such as the throughput on the IPS and Amazing Web Filtration, as well as reasonably low price to renew, I felt they started sacrificing real security into the hands of their marketing people. Their focus was on business acquisition more than security from what I witnessed there, as well as an ever encroaching intelligence complex intrusion into their company and culture. I hit the road, and with that, sold off all of my Fortinet gear. I don't even work in the UTM/Firewall/IT Security industry anymore but do something far more lucrative. But I will probably take a really early retirement and build a nice modern container home (Faraday) on a few acres in the north country of the USA and get away from it all.
Anyway..
I roamed around various UTM's.. Meraki, Untangle Juniper, Watchguard, Cyberoam, even some seriously hardened German brand. Ultimately none of them were to my liking, and all of that had their own set of issues. By the way, Watchguard uses Cylance now...
For home users the Gryphon product line is going to offer as tight, even tighter in some respects security. So personally I stick with that for my home, and deployed them all to my friends/family homes. So far their infection rate basically dropped to zero and I haven't been asked to come clean something up since. I'm good now, Gryphon and a Pi-Hole with a million items being blocked and some lockdowns and security on endpoints and I am happy with the results.