 Update- car is worse than in beginning, on 3rd set of tires at 39k miles and all original problems still there.....Since the time I started this car for the first time at the dealer it has had nothing but problems. First when the A/C is on the car sounds like a jumbo jet trying to take off but can't (you can even hear it over the radio) and guests always ask me "whats wrong with your car?". The service department told me they can't fix it because "they all make this noise and Infiniti knows it". Next the car grabs every rut in the road and flies all over the place and when I say "flies" I mean way beyond a safety concern. The problem even gets worse when braking. Also there is a buzz noise when driving the car that you can hear over the radio but the dealer says "they can't hear it and they can't fix it". I could go on and on about how bad this car is but to tell you the truth I have already waste so much of my time on trying to get this car fix and trying to get Infiniti the car company to do something about it (which they won't & they have told me this one 3 different occasions) i just can't stand this car anymore. If you want all the problem you can handle and then some please buy one of these cars. I thought this was going to be a great fast and cool car but all it turned out to be was a huge waste of my time and money. Sincerely, a 3 time new Infiniti buyer and owner (also a disgusted customer of Infiniti). *******update at 39000 miles: WORST car I have ever purchased, all of the problems have persisted, A/C whines louder than I can turn the radio uo to cover it up, brakes start shaking every 3000 miles and it is not because I ride the brakes, tires wear out at 18000 miles, just a terrible terrible experience with a brand new luxury car. Nissan North America/Infiniti has refused to do anything about the concerns I have. I only thing I have to look forward to is the day I trade this car in which is quickly approaching.Update at 45000 miles. All problems at still happening and Infiniti hasn’t contacted me to resolve any of them. Worst car ever.