Ketch, you are fast, I made a few phone calls to arrange to rent this lenses locally to try it and mean time you sold it, true Italian:-)
I see it in B&H store in NY listed but out of stock
Did you try to use this lenses on models in natural PM light inside the room?
From the charts it looks like it is sufficiently sharp when stepped up to 1.4
Also what I hear, it is very bright lens regardless the speed.