i saw two at the dealer this past weekend people (in particular a lot of women) were test driving them. Pretty huge in real life, exterior I'm still iffy on. Interior was gorgeous. I've heard nothing but good things as to how they drive but quite frankly why anyone would take one over an M5 is beyond my comprehension.
Not impressed at all, ugly on the outside, pretty on the inside... EVO recently put it up against the XFR and Quattroporte.... http://www.evo.co.uk/carreviews/cargrouptests/242737/porsche_panamera_v_maserati_quattroporte_s_v_jaguar_xfr.html
I saw a turbo on the road yesterday..perhaps because of my view sitting low to the ground in my Maserati I have to admit it was very impressive and stylish appearing. Not like walking up to the car in a parking lot at all.