Is the ttartisan m 50mm f 0 95 asph worth it?

Here is what the site says about that.

From TTArtisan M 50mm f/0.95 ASPH: TTArtisan M 50mm f/0.95 ASPH: A prime lens by TTArtisan for Full frame cameras, 50mm f/0.9. Specs - Maker: TTArtisan - Focal length: 50mm (prime) - Maximum aperture: f/0.9 - Made for: Full frame sensors - Mounts: Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Leica M): as marked, 50mm. Cameras it fits - Leica M9: Full frame - Leica M9-P: Full frame - [Leica ...

From Leica Noctilux-M 50mm f/0.95 ASPH: Leica Noctilux-M 50mm f/0.95 ASPH: A prime lens by Leica for Full frame cameras, 50mm f/0.9. The fastest M lens; heavy, and focus is very thin wide open.

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