I have just purchased one of these Gandy Dancer's as a novelty item on a projet layout.
I did have a few problems getting it up and running at first (very jerky and intermittent) but I had been warned about this, and read a few of the forum threads about it, and after some meticulous attention, it runs as sweet as a nut now.
So what's the problem you may ask, well, after checking with an EMC meter, there MAY NOT be any suppression on the motor on this little gem, but wanted to qualify this before I started to go about the task of attempting to fit one, some other electronic bits that are around on the layout seem to be effected when this runs, but not with any of the normal loco's, which of course do have suppression capacitors fitted.
Any info would be appreciated.