Like Rossi, I am still not wild about the looks, but they are sure getting better.  And the 540HP is enticing.  The Turbo S version--sure to come in year or so--will be tempting. 

Every time I accelerate strongly in my Cayenne Turbo S, I marvel at the V8's power (550HP)and smoothness and think about what it will do for the Panamera. 

As an aside, though, I admit I am getting quite comfortable sitting higher up in the Cayenne, after decades of sitting in 911s and 356s.  I do notice how much lower I sit in a Panamera, and that the rear view out the back window seems constricted.  Guess its age (68 next week) and laziness, but c'est la vie...