I've owned by FX35 for 5 years now and have zero problems. I do maintain it and Infinity service ain't cheap, but its still quick, tight and the biggest problem is a small split in the drivers seat from my fat rear. My OEM tires lasted 78K miles, the snow feature got me through the recent DC blizzard, it handles like it'll little brother (Nissan 350Z). The stereo still rocks with a powerful subwoofer, no squeaks, paint still shines like new... I will keep this car forever.
Very quick for it's weight. All wheel drive saved my life by preventing rollover... Not many cars can do that!