I have now completed three test drives. P85 about two months ago. Then, this week, I drove an S85 and then a P85 back to back. I thought I would share some thoughts with the board. Pano roof - sat in the rear seat of a non-pano and then a pano. I see the head room problem now (I am only about 5' 9"). I am not a sunroof guy and typically order cars without. However, I will likely go pano on my build because of the rear seat headroom issue. Just an FYI for those going the same direction for the same reason, if the back seat passenger leans all the way back, he/she will hit the back of the pano roof frame before the headrest. Yes, there is much more room directly above one's head. However, one will hit their head on the back frame of the pano if one leans back all the way (almost unnatural though). S85 vs P85 - as some have mentioned in this forum, the main difference here is how much lighter the P85 feels. That is the only way I can explain the difference. The S85 is plenty fast from 20+, however it feels like you are moving more weight. The P85 is just stupid quick - as many of you know. Unfortunately, the roads were a little wet from some earlier rain and I really could not get on the throttle as I wanted. From a dead stop to 60mph, the wheels just couldn't hold traction with the torque on either car. Handling - my first test drive was on springs. The last two had air. I did not detect a big difference regardless of ride height. I may save some money here. However, after coming out of an M5 (and several other German cars), the Model S handles just fine compared to the Germans. I am not saying it is excellent, but it is really good. I have no complaints. Cyclone wheels - these look better in person than on the ordering site. Not sure if they are worth $2,500, but I could recommend that folks look at these if they want turbines, but not the 21" size. Parking sensors - These work pretty well. May be worth a second look given that one has to back the Model S into spaces for Supercharging, etc. Cup holders - buy the center console. I see no way to use the cup holders and still be comfortable driving the car.