OK, just received the 58mm f/1.4g lens and took it out for a spin in Waikiki with my D800.
All shot wide open except for one.
No real testing on my part, just shooting this and that.
Lens definitely has a distinct look, lovely bokeh, extremely shallow DOF and is definitely not razor sharp wide open at close distance.
So far I am very pleased.
Hope to do a bit more shooting this weekend.