Just got my windows tinted on my 06 6. I didn't get a chance to take pictures yesterday, will do so after work, looks great. 20% on the back windshield and 35% everywhere else.
Just got mine tinted too. I didn't do the driver or passenger windows, but everything behind that on my wagon is 35%. It looks great! Paid $175 for Llumar film with a lifetime warranty.
A great, reasonable installed in Richmond, VA is East Coast Tint. Their web site.