 So, I had my 2015 Q50 3.7L V6 AWD Sport Sedan for about a year and a half. Loved every aspect of the car. Infiniti introduced a 3.0L TT Engine last year and so I made the switch (I lease my cars - the best way to go!) I absolutely love the new engine! The throttle/acceleration response is to the point and almost instant! I drive this car daily back and forth to work and some fun weekend drives and am very happy with it! This time, I added the Driver's Assistance package to give me some safety features and I'm glad I did it. The only thing that I dont like (it has more to do with my personal preference - nothing wrong with the feature itself) is that the forward collision warning and emergency braking assist kicks in when I'm zipping in and out of traffic. I know I can turn this feature off but for the 10-20 seconds of "fun" driving, I wouldnt want to keep having to go to the settings to turn the feature of, even though it can be turned off just by turning the Traction OFF. This car is very smooth and it can get up to speed in no time so just in case... I never turn the traction control off. Over all... very happy with the change and upgrade. I'll probably switch to the RedSport next time around and get a feel for it that beast as well!