Not from me. I have the 50 f/1.2L and will probably sell it. It's not worth the extra money and outdoors at low ISO the 50 f/1.4 color rendition is actually slightly better, especially on my 1Ds 3. There's nothing magical about it particularly, and side-by-side images, even wide, aren't any different to me. Another point, stopped down narrower than f/4, both the 1.4 and 1.8 lens are sharper, which matters to me. I've been told I'm wrong on this point yet I see it in my images, and Bryan Carnathan's charts show what I get. The 50 f/1.2L is a specialty lens from f/1.2 to f/2.8. After that, the 1.4 matches it or does slightly better, and this is well documented in all reviews of the lenses.
If you want great images from f/1.2 to f/2.8, the 50L is the only lens that will do it. But narrower, there are actually better lenses.