[wtallis]

> Frankly, I’m not sure I have the time or trust myself to set up OpenWRT correctly/make sure it’s updating regularly/I’m installing the correct version etc.

As long as you're not going out of your way to install a nightly build of OpenWRT and you just stick with the stable releases, it's no more difficult than installing new firmware from the manufacturer and configuring it. The web interface for configuring OpenWRT is comparable to what most consumer routers provide, except that OpenWRT's UI is shared across all hardware platforms instead of being laden with vendor-specific branding and snake oil features.