Owned for 3 months/4000 miles, replacing a (trouble free!) Disco 3. Chose BMW over new Disco/RR Sport hoping for better fuel consumption & improvement on Discos 'boat like' steering & handling on motorways. The latter is way better in the BMW, though chose the optional Adaptive Drive (expensive, but recommended) after experiencing fidgety ride on standard test X5. Fuel consumption is a disappointment though, averaging only 27mpg (way short of the 34mpg BMW claim), a tad better than the Disco (26mpg). However, unlike the Disco, the X5 consumption is highly dependent on how you drive & whether it is low speed or cruising - returned over 40mpg on cruising A roads at 50 to 70mph. Some minor negatives include puncture in rear run flat after a week which took 5 days to source a replacement at £350, protruding sills mean you plaster your legs with dirt on exiting car & paint on front edge of body coloured rear wheel arches is being 'sand blasted' by muck kicked off front wheels and no mud flap option for M Sport body kit. Positives – ride, handling, engine refinement, performance & smooth auto shifting, well built & comfortable cabin (rear seats much better than Disco), useful lockable under floor compartment if 3rd row seats not specified and as good as the Disco at towing a horsebox (includes trailer stability system). Overall, very pleased, despite my economic justification of better fuel consumption offsetting higher vehicle cost not being true in reality.
Andrew Hill, January 1st 2009