Are AI-generated frontends actually usable for real products?

I’ve been testing a bunch of AI frontend tools recently (Lovable, v0, Replit, etc.) and I’m curious what other founders think.

They’re impressive for quick mockups, but I keep running into the same issues:

• UI looks ok at first but gets messy as the app grows
• No consistent design system
• Hard to maintain or extend properly
• Lots of refactoring before you can actually ship

For small landing pages they’re fine. But for real SaaS dashboards / production apps, I’m not convinced yet.

Curious:

1. Has anyone here actually shipped a real product using AI-generated frontend code?
2. If so, did anything break?
3. Where do these tools fall apart? Structure, scalability, styling, state management, etc?

Genuinely want to understand if this category is early, or if I’m just using them wrong.

Would love honest experiences.