I like Atlas models, but so far I have had much better luck with MTH mechanically. When an Atlas power truck gives out, there is a bearing issue I have not yet figured out. Atlas has been more than helpful with spare parts, but so far, I get poor results with rebuilding.
With Mikey's stuff, if something wears out, I replace it, and the model goes back to work. Understand, our environment is not like a home layout - the trains must run eight hours a day, six days a week. So far, nothing - nothing - has outlasted the MTH, and that includes scale horizontal motor transmissions. It is easily ten to one.
Opinion.