Hi Paul, and welcome to the club.
I agree --- the x type is a very good car, and Jaguars, like every car sometimes have an issue that needs attention. For every poster who asks about an issue, there must be a couple of hundred who have never had a problem with their car.
We do have many members who don't mention that their cars are working perfectly, in the same way as many people don't say that they live fillet steak, but who will complain when they get a tough one.
So for the record, I have an S Type diesel. I have never had a problem with the DPF. I get over 30 mpg around the city and just under 50 mpg on long runs. I have not found any rust on my car and all the electrics work!
Regards,
Peter.