As far as brands of firewall appliances on Ali Express, I hate to say it, but at the off brand level, it’s 6 of this, half dozen of the other. You pick the spec that gives you the best bang for your $$. Before I pulled the trigger tho, I would do a cursory search for reviews. You’re probably not the only person on the planet that has ever bought that specific off brand, so the chances there is a review somewhere is good.