Yes I've been only running them together but they even look dwarfed by the locos pulling them, and running them together means not enjoying a key feature of 1950s & 1960s CIE, namely the running of trains with an insane variety of passenger and goods stock. I tried assembling such a train and the Genesis coaches just looked too small to me. It's a pity, because they are lovely models and very high quality. Admittedly I only have CIE diesel locos so am guessing the size issue wouldn't be as prominent if they were being pulled by a J15 for example.