Overall I think this vehicle is very well built, strong engine, and AWD that is smart and knows what to do when you need it. I did purchase pre-owned with over 60,000 miles but I love the 3.7 V6 and transmission pairing. My mom has a 2013 as well, both of us enjoy it a lot. You can sit back and ride along with traffic comfortably, but when you need to get up and go or maneuver though traffic, the transmission and 3.7 V6 are quick and power you through what you need. It handles great around corners and through town. It's not too big but just big enough, anytime I have rear passengers they always compliment the room they have and the heated seats. My only complaint is the shifter, sometimes it doesn't know it's in Park and you have to jiggle the button a little, and after turning a corner when it's going into 2nd gear it's a tiny clunky, but my last car (Mazda) has the same issue, so I'm light with the gas pedal after turning corners.
The MKX is a nice luxury car. Great pick up and the comfort is unbeatable. My only criticism is the sound system of my 2013 is below par for the price of the car. I mention it every time I take it for service and am always told the system works and sounds fine. It really doesn't. It's tinny. The surround sound is a joke. You can adjust all you want and there's very little change. I understand the 2016 has a new sound system. I know why.