I traded a 2011 Q7 for a 2017. 15,000 miles on it now and no problems or repairs. It is a completely different car than the 2011, better in every way: More comforable, much better ride but still quite firm, seats are excellent (the '11 seats were rocks), quieter, so far a great car to drive and you can really push it through corners. The virtual dash has a tremdous amount of information you can page and it is great looking unlike the "ipad" look in many cars.
Things I'm not crazy about: the shift pattern is completely different from earlier model cars and it gets a lot of getting used to. Reverse is where Park used to be and the shifter always returns to the same position after you shift. No clue why auto manufacturers are doing this. I've had this car for 8 months and still find this feature completely annoying. The electronics and creature comforts are overwhelming. If you buy one of these spend some real time with a knowledgeable sales person before you take it home.
Overall I guess it has something for everyone. It's a great driving car, and I would highly reccomend it.