I never drove a DF, nor did I ever get a ride in one, as by the time I had moved to Auckland, 2/3 of the fleet were being rebuilt into DFT's and the remaining DF's spent a fair bit of time running trains out to the bay..
I imagine a DF would probably be quite comparable to a DC at the time, with regards to ride quality and noise / vibration...
Anyway, onto the pictures..