Kenrockwell has reviewed the Canon 50mm f/1.2L lens and love it. To them its the best super-speed 50mm lens they have ever used and also like it for its fast auto-focus and modern ergonomics. However the Autofoucs at times fails to read the situation and the lens which retails for 1600$ found to be expensive.

The EF 50mm f/1.2L USM is a peerless new standard lens with an ultra-large aperture for a narrow depth of field. Its very versatile and has a lens coating which not only protects it but also minimize the ghosting and flare that frequently occurs when lenses are used with digital cameras.

In the end the website writes "This is the sharpest 50mm high-speed lens I've ever used, when it's in perfect focus.I'm not all that hot on this 50mm f/1.2 lens because I didn't get proper auto-focus results 100% of the time. I'm used to that on my Nikons.If you can get over that, or you have better luck with auto-focus or focus manually with a special screen, go get one! "