I own a 2.0d X3.
I reckon most of you are right when you say the car sounds like an airport taxi. Or maybe a Singapore taxi.
Having owned it for almost 1 month now, I have made the following observations:
1. Noise, Vibration, Insulation: Damned choon - compared with other diesel SUVs in the market (i used to drive a Toyota Fortuner 2.5d before it was stolen). I've also driven a Kia Sorento owned by a friend recently and there was just no comparison with the X3 in terms of cabin noise.
2. Handling and ride comfort - Aside from some wallowing on uneven surfaces on the highways, it rides and handles as good as most cars.
3. Fuel economy - Just the past week, I've made trips down south to Singapore and up north to Penang. Covered approximately 2000kms this week on 2 tanks of fuel. Avg combined fuel consumption (highway plus sales runs in penang, seremban, melaka, jb and singapore) is about 6.4l / 100kms. Which at today's diesel prices equate to approximately 16.5sen / km. My sister's Myvi is avg'g 21 sen /km. That I reckon is just amazing. Road tax is a little on the high side: RM 438 p.a. but with the fuel savings (assuming the petrol and diesel prices remain proportional) will be more than worth it - plus it qualifies for the RM 625 rebate on personal registration.
I love my airport taxi!!!