OpenWRT is great and the built-in web interface, LUCI, makes it as easy to configure as any serious network kit. What I will say, though, is that OpenWRT is a real network OS, more akin to enterprise grade tools like Cisco or SonicWall than anything sold in a big box store. Again, LUCI makes it easy and hides a lot of complexity so there's nothing to fear, but you quickly come to realise the power of OpenWRT isn't that it turns your Wifi Thing into a better WiFi Thing, but that it turns your Wifi Thing into a WiFi, routing, firewalls, bridging, VLAN, mesh, PPP, VPN, and a thousand other things Thing.