I have the Cayenne S. I absolutely love it. Before buying the Cayenne, I test drove the new X5 (I used to have the 4.4 - 4 years back), Range Rover, Mercedes ML500, and Acura MDX. I already owned the Touareg V8, which was in the shop every other week. The BMW was by far the best interior, comfort wise. The Range Rover was very bumpy. It felt like a truck to me, but nice interior, not as fast as I was anticipating. The Mercedes was alright, but again rode like a truck. MDX was quite nice, but slow as a dog. The Cayenne had a quick pick up, handled like a Porsche (obviously), and the interior functions were perfectly placed for the most convenience. I think the Cayenne can be quite bumpy on back roads, but highway driving is very smooth and comfortable. I have owned the Cayenne S, new since 2006. I have only had it in the shop for oil changes and scheduled maintenance. I did wear the original tires out pretty quickly and had to replace those after 11,000 miles.