 I wanted big and comfortable.  Shopped Lexus, Cadillac and Lincoln.  The QX56 was cheaper than the Escalade, bigger than the GX470 and more reliable than the Navigator.  It is a little odd looking from the outside, but looks great from the drivers seat.  And oh what a drivers seat it is...  Its like wearing new shoes WITH new socks.  So comfortable.  Passengers LOVE the second row seats.  The 3rd row, like most, is better suited to smaller kids but I could sit back there for a 30 minute ride.  Bose stereo sounds awesome. AUX input is strangely missing, but you can connect a phone/ipod whatever to the DVD input.Mileage isn't great, but it is the same for most of these trucks.  Read up about brake issues on these trucks.  Same for Nissan Titan and Armada.  Warped rotors are not a big deal to me.  $56ea at the local part store, I don't care if I need to replace them once a year.  The other brake issue is the 'delta stroke sensor'.  You will want to google that.  A sensor goes bad in the brake booster causing the antilock brakes to kick on.  Feels like you are trying to stop on ice.  I knew it was a possibility so I wasn't freaked out when it happened to me.  Truck still stopped pretty good, just had that grindy/vibrating pedal feel.  You can clear the fault by simply restarting the vehicle.  If it happens a few more times I will look into replacing the brake booster ($180)