Short journey/ low mileage

No problems what so ever with mine. It's coming up to 4 1/2 years old now with only 14k on the clock.
Only twice have I found that burning off smell as you get out of the car when parked in my garage.

Bought mine secondhand as well. Previous owner had just changed the DPF. His wife just used the car in town

I also haven't had any problems with DPF. Mine is now coming up to three years old and 16k miles. I do a mix of mainly short journeys (3 miles) a day plus a weekly trip of 30+ miles and occasional monthly longer journey of 100+ miles.