I have several PS-1 locomotives that I like a lot and have been running (only in conventional, of course) for more than fifteen years. They have been trouble free and low maintenance. When well broken-in, they run smoothly at low speeds, even without speed control. I just turn them on and let them run. For me, the sounds and "features" are satisfactory, and installing a BCR eliminates concerns about the battery. And, as mentioned by GRJ, they can be upgraded to PS-3.
MELGAR