Thanks. I found the post below comparing it favorably to the CW-80, which is part of what got me started thinking about it. But maybe I should consider a Z-1000 instead.
I think it still might have a place, though. It could be a cheap and simple way to get the "I want a train set for Christmas" mission accomplished, and if a larger layout follows (which is the plan) maybe it would make a good extra transformer for a trolley or accessories wiht something bigger (Z-4000?) for main track power?
So the question still remains: is it a good 50W transformer, and is the circuit breaker the fast modern type?