I have a 72 plate Q5 40tdi owned for 12 months and used mainly for longer journeys. Absolutely no DPF issues whatsoever. In addition prior to that I had 2 diesel Evoques and a Discovery sport again used mainly for long journeys between Cumbria and Northumberland. No issues at all on any of these. The Q5 gives me about 45mpg on most trips. The Evoques gave about 43mpg.