Let me add to my statement by saying I choose to replace my PS2 electronics with BPRC, I had ZERO failures with PS2.
I ran my PS2 trains pretty regularly. The folks who have failures, are they running the wheels off their trains (high mileage) or are most of the failures straight out of the box?
Now that I think about it, only 1 (RK Imperial 0-6-0) of the 7 steamers I have came new with PS2, 1 was converted to PS2 from Locosounds (RK 2-8-0), 1 had been gutted by the previous owner (another RK 2-8-0), 1 was only a brass chassis that I built a boiler for (Weaver 4-6-0), and the other 3 were Williams brass Crown Edition engines (2-8-2, 4-6-2, 4-8-4) with reverse boards. So, 6 out of 7 have upgrade kits in them.
The only problem I've had with an engine with factory installed PS2 or TMCC was a RK NW2 that had an intermittent problem. I traced it to a strand of wire that was periodically grounding out on the chassis when the trucks swiveled around a curve, on straights it performed fine.
The 2-8-0 with Locosounds didn't like cold weather. When my layout was in the garage if it got below 50 degrees I had to turn the heater on and wait 30+ minutes for the layout room to warm up enough so I could reverse direction. When I brought the layout indoors the problem went away.
Could the upgrade kits be more rugged than the factory installed systems, or are the people they're using to install them at the factory not doing it right??? Are they being rushed to produce, not properly trained, or is there a sinister plot to undermine all the train operators of the world