 There are a lot a good features about the BMW X3, but overall if I had the decision to make all over again I would choose something else.  First the good things.  1) The power from the 3.0L turbo is very good.  It is refined and the transmission shifts smoothly.  2) The active stop and go cruise control is worth the extra cost.  When you are sitting stop and go traffic it is a wonderful feature.  3) Back seats and cargo capacity are very good for this class of SUV.  4) I-Drive is easy to use once you get the hang of it.  5) Heads up display is a great feature.  I have it on another car and think more vehicles should have this as an option.Now for the things that I am disappointed with after having this BMW for a few months.  1)  The upgraded Harmon Kardon system sounds just OK.  I had a Harmon system in a Jeep Grand Cherokee Summit and it rocked in comparison to this system.  At louder volume levels the sound is a bit harsh.  2) The keyless entry system can be a bit flakey.   With the key in my pocket I have issues opening and locking the door.  I have to take the key out of my pocket to make it work.  I don't have this issue on my GM with a keyless system.   Plus for a vehicle of this price point, I think its kind of cheap to not have them on the rear doors too.  3) Both rear tail lights have flaws from the molding process.  I have looked at others and you can barely see the injection points in the lens, but mine stand out like sore thumb.  They look like white dots on the tail lights.  The dealer says they are in spec.  Again for the price of these SUV's is seams these could be made better.  4) Went I got it I thought the interior was nice and was fitting of the luxury brand.  But over time, some the materials feel cheep.  Even with upgraded leather, the ruff texture makes it feel like fake leather.  It was not until I got in my friends new Cadillac XT5 did I really notice the difference.   The Cadillac is light years ahead on interior quality.  I can feel the ruff seam on the top and bottom of the turn signal stalk where the two pieces of plastic meet.5) No vented front seats and power tilt/telescoping wheel.  A miss on this class and price point.6) Auto Start/Stop is poorly programmed.  Many times it stops the moment you stop.  There should be a couple of seconds delay.  When coming to a stop sign or switching gears while pulling into a parking space, I have had the engine shut off just to restart again while it was shutting off.  Then there are times when you think it should shut off and it does not.   I have stopped and put it into park and it won't shut off.  The only plus is you can disable the feature.  I highly recommend this if you have the A/C on.7) Front parking sensors are slow to engage.  Don't pull up to something quickly and expect them to be active.8) Having to hit the Start/Stop button twice to shut everything off is annoying.  Once to stop the engine the second time to turn off accessories.  If you don't the accessories stay on even after you open the door.  It will timeout once you have locked the door, but I don't trust it.  You should only have to hit it once to turn the engine off.  Then when you open the drivers door it shuts off the accessories. 9) It was not until I a took a long trip and my left leg started falling asleep how bad the comfort is on the bottom of the front seats.  They are not good.  The cushion is too short on the front and sides. 10) Just got the recall notice about the rear child safety seat anchor.  Give this vehicle is been on the market for a while I am surprised that this has come up this late in the product cycle.  What concerns me how they have to fix this.  They need to remove the rear seats and carpet, send it out a body shop to have a support bracket welded in.  Not liking the sound of welding something in a brand new vehicle.***UPDATE***I traded the BMW in after 6 months.   When you spend this kinda money on a car and are not happy with it you need to go with something else.   The something else is a 2014 Cadillac CTS Vsport with under 25K miles.   This is an amazing car.   Can't wait to get into it each day and drive.   This is what a luxury car should be.