 Had a loaner 2017 premium plus for 3 weeks waiting for an ordered 2017 A6 to arrived. Loved the A6 Prestige so much I ordered a 2018 Q5 for my wife as soon as the adaptive cruise and other packages were available. It was equipped with comfort seats and everything else except warm weather package because the 2017 comfort seats were comfortable and the 2017 sports were very hard, narrow and less comfortable. The initial release cars were not fully equipped and the dealer did not have but 1 or 2 demos to test, not were we told the 2018 Q5?seats were being redesigned. From what others now say, the vented warm weather sports seats of the 2018 were made more comfortable,  though the seat bottoms and back still are very narrow with stiff plastic at the edge of the bottom and narrow upper bolsters. We waited 3 months to receive car and drove on short trips around town for a month. Then, took 2 hour trip ( 4 hours round trip) with spouse.  Both of us could hardly walk when it was over, and it took a couple days to get back to normal. From that point on, every time we sat in the Q5, our backs and bottoms began to hurt so much we couldn’t drive it any longer. The 8-way seats do not provided enough adjustments to fine a sweet spot and we could not live with the narrow seat bottom with hard sides, the lacked lumbar support for the passenger/limited height adjustment for driver, and very little upper back support. Plus the rear of the seat bottom cupped our bottoms in such a way as to cause pressure on our lower back. The dealer offered to buy it back as a used car and we took about a $10k hit, which was a bit better than if I had trued to trade. In hindsight, we should not have rushed to buy the 2018 Q5 just because we liked my 2017 A6, though it was a very cool looking, well engineered and popular vehicle around here. I personally loved the Infotainment and vehicle technology systems because they were so easy to use and were controlled from the center console, not on a touch screen. Plus, I got 31+ mpg on the one trip using the adaptive cruise/lane keeping to control the car. Only after we had to go looking for a substitute did we learn that the 2018 Volvo XC60 Inscription which came out after we ordered the Q5 offers all that the Q5 offers with great comfort and just a bit less mileage. The Bottom Line: If comfort is something important, better test drive a Q5 with both kinds of seat configurations on a trip of at least an hour or so before buying. The comfort seats are anything but comfortable. They could bring on back troubles that never were anticipated. Moreover, unless the buyer has narrow hips and back, fitting into the design offered by Audi will be challenging. Even if the buyer’s body fits in the seat compartment, he/she may not find an adjustments that allows for comfortable positioning.