We've got a 2014 Explorer limited 4wd with the v6 and 7100 miles. Love it. It's the wife's of course, but I drive it every chance I get. We haven't had a problem with sync and both actually love it. It works great for us and the only thing we don't use or have interest in is the voice commands. That's where I hear people have problems with lock ups. Also, our gas mileage is great. We average around 21 with city and highway and have gotten up to 23.5 on a tank on regular state roads at 55 to 60. We live in the green mountains of Vermont and it has to shift on quite a lot of the hills. We had a 2011 equinox with the v6 that averaged 17.5 to 19.5 so we're really loving the explorer.