Is the 7artisans 9mm f 5 6 worth it?

Here is what the site says about that.

From 7Artisans 9mm f/5.6: 7Artisans 9mm f/5.6: A prime lens by 7Artisans for Full frame cameras, 9mm f/5.6. Specs - Maker: 7Artisans - Focal length: 9mm (prime) - Maximum aperture: f/5.6 - Made for: Full frame sensors - Mounts: Sony E, Nikon Z, Canon RF, L-Mount - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Sony E, Nikon Z, Canon RF, L-Mount): as marked, 9mm. - On APS-C (Sony E, ...

From Laowa 9mm f/5.6 FF RL: Laowa 9mm f/5.6 FF RL: A prime lens by Laowa for Full frame cameras, 9mm f/5.6. A 135-degree rectilinear ultra-wide, the widest made for full frame.

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