I am really looking forward to the next release. I have 2 dome cars and the sleeper. they are fantastic, and I recommend anyone building a layout purchase one of these, their long wheel bases, small wheel flanges, and scale car lengths will tell all.
The only thing that looks odd is the blinds appear to be mounted on the outside of the windows and there are no people inside.
I will wait for the cars and I hope the rear observation car is next, not many people can fork out over a 800 dollars at once for a passenger set, but if you release the cars over time... it sure helps the wallet.