The core of it works well: articles live in categories, support full-text search, and show up as suggestions the moment a customer starts typing a new ticket, which genuinely cuts down on repeat questions reaching an agent.
Agents can search and link articles from inside a ticket, and (per HappyFox's own Slack integration) from inside Slack too, so answering a common question doesn't mean writing the same explanation twice.
What it doesn't do is know when the facts inside an article change. A return policy, a shipping cutoff date, a current outage, a price, once written into an article, sits there exactly as written until someone remembers to go edit it by hand.
That's the real gap for teams whose answers depend on something that moves: inventory, order cutoffs, service status, pricing tiers. The knowledge base is a great place to publish the answer; it's not a place that knows the answer changed.