@Mike CT thanks for the recap. I had heard about most of those issues. You didn't mention the tendency of rails to come loose from a switch, requiring them to be re-glued or re-staked.
I also understand that most of these problems have been addressed by Atlas in subsequent releases. Unfortunately, as I posted on another thread, Atlas didn't update the product number or packaging to differentiate the "new and improved" product from the old. (I'm guessing, to protect their dealers' and distributors' inventory value!)
@Greg Houser How did you know what you were getting? Are there any "spotting features" that I can use to avoid the trouble-prone first generation track & switches? I need a LOT of track, and especially O36 switches. Given the vagaries of supply, I'll probably have to buy some used :-(