I've never used it but pretty much every report has it less sharp than all of the other 50mm lenses and that means miles less sharp than the new Otus. I'd bet it has way more longitudinal CA too.
OTOH it also has AF, which the Otus lacks and for some stuff that can make it a lot more usable.
Also it's not as much super faster than other 50mm lenses as he claims either, at least not on most digital bodies. Most DSLR sensors simply can't capture the extreme pathways of light that such fast lenses let through so the shutter speed gains and lessening of DOF are not nearly as much compared to an f/1.4 or 1.2 lens as you'd expect.