I own two DMaxes right now. One I drove as my POV for a couple of years. I bought two in the same year because everyone was saying how great they were and I wanted one! ...
Earlier this year I rebuilt the Turbo and changed out the FICM, it runs ok, about 170,000 miles on it.
I had already replaced the head gaskets a couple of years ago.
The other truck has about 70,000 miles on it, it is parked with an exploded piston... (Which destroyed the block).
When they run right, they do pull though.
My V10 Fords have proven much more reliable and cheaper to keep running.
Anyway, my pop bought a 6.0 L diesel the same year, well it made the DMaxes look mighty good by comparison.
He also bought a Dodge Cummins a couple years later, other than a set of failed injectors it has been very reliable.
Just my experiences, your mileage may vary.