I remember !
The last "real" NDB approach that I did was about 15 years back into Cologne one night when the ILS was off for maintenance, the ADF needle spent almost the whole approach swinging between the NDB and two large thunderstorms, I thank my luck that the cloud base was well above the minima that night.
Each time I do an IR renewal as I go down the NDB approach I can't help thinking that in this day and age I should not be doing this with a 78 tonne airliner! (or a PA34!!).