I have 3 MTH PS-2 engines and they won't work with the Lionel CW-80, it makes them act like they are constantly starting & stopping about 15 times a second, and the engine sounds go wild.
I would rather spend my money on a re-built post war ZW, at 275 watts you won't need much more power then that except for another ZW to power up more tracks with. I run 8 to 10 trains, not all at once but it's nice to have enough power for them all.
I have a post war; ZW 275 watts, a post war Z 250 watts, a post war KW 190 watts and 2 MTH Z-1000's 100 watts each. The MTH and older Lionel transformers play well with almost any brand of trains.
I was able to test my MTH engines at a friend's house who had the Lionel CW-80 so that's how I found it don't work with my MTH engines.
The new Lionel ZW-L is nice from what I hear but it is out of my price range, most I have seen are over $750.00 new.
The MTH Z-4000 is another nice size transformer(over $300.00 new) but I want track power and not accessory power so I will go for an older ZW or the Z-1000.
Lee Fritz