Errr - none. Nothing has gone wrong at all to date.
Fuel consumption is about 44-46 mpg depending on the type of driving. Can drop down to 42-43 in town.
It's been great so far!
Six seats will fit most normal sized adults, although they need to be friendly if all the seats are in use!
Great for 2 adults & up to 4 kids.
Kids love being able to sit in the front and see out.
Very practical - six seats & luggage space with all the seats in use.
Reasonable oddment storage places, but no sunglasses holder.
Diesel engine is very quiet and refined with excellent performance, especially in 3rd gear.
6th is a genuine overdrive top, great for motorway runs and the gearchange is very slick.
Cruise control works very well.
Would like the option to be able to play mp3s through the stereo (not available, but at least you can get long wave on the radio).
Ride and handling are excellent.
Climate control works with no fuss.
Very pleased with the car to date.
18 months and 25000 miles; it still hasn't gone wrong, and it's still wonderful.
40,000 mile update: Nothing to report of any note.
My son pulled one of the pieces of plastic trim off the rear middle seat, but it clipped back on easily. Two tiny rust bubbles on the tailgate were dealt with under warranty by the excellent local dealers.
Fuel consumption has improved and now averages 48mpg driven sensibly, over 51 being gentle on long motorway runs and as low as 44 (!) driven briskly whilst laden with 4 people plus holiday gear. This is pretty good for a full size 6 seater.