We purchased the X3 as a familly vehicle. We regularly transport our 2 (young) children in it. The reason we chose it is that we do not need a third row yet and we wanted as much as possible to get a vehicle that handles like a car without getting a station wagon. As you can imagine we also wanted at all costs to avoid the dreaded van. The X3 is just large enough not to feel cramped and yet remin nimble for city driving. The build quality is excellent; however the texture of the dash is questionable and the door handles could stand to look less like they were made in China. Handling is simply amazing: the truck handles like a (sports) sedan. We have found it comfortable (no sports package).
Breaking on par with other BMWs, which is to say way above the rest. The x3 breaks better than the our Audi A4. The smoothness of the engine is another favorite feature, as is the automatic transmission; it holds speed well and the sports features really makes even the 2.5 engine move well.
BMW should improve the front dash material because it lools cheap as compared with the rest of the car. The door handles as well could look more like the 3-Series. As well the body- coloured bumpers option should be cheaper-they would sell that option more that way.