Was a passenger in one of these at a Porsche event last year, fantastic things, really comfy, was only the 3.6 one but it didn't half shift, best thing about it though was as DM said the interior, absolutely top notch and put together properly!
Its the best Porsche interior ever i think without a doubt. Very very low though, same as a 997 thats the only thing that i can see putting me off liking this in the long run, i just cant be arsed climbing out of cars any more or folding myself in them i just want to step in and out these days.