 This is our 2nd X5 diesel. Both have been trouble free. Mileage is much better than projected.  Highway mpg is 35-37 depending on terrain. Same for previous X5. Diesel prices average 10% higher in FL, but mileage is 60-80% better than V8 gasoline. No brainer since torque is similar. The one thing I would like to see with BMW is weather radar/ability to access iphone apps for such via LTE networks. BMW says that is coming.  X5 is adequate in size, bigger families may wait for the X7.  This has been a superior vehicle and rides better than our ML series did. Yes, we will continue to buy the X5 diesel.