The one thing that has me scratching my head a bit is the models very low speed. For a sleek looking diesel railcar like this, I expected a little 'pep', but my model crawls like a freight locomotive! To be honest, I've been experiencing some anomalies with my Roco Multimaus Pro/Multizentrale set up and I just changed by track voltage from 19v to 13volts (discussed here) so I'm investigating if either of those are in some way responsible for this.
Anyway, at some point when I can find time, I'll do a full video review (and will hopefully have this mysterious slow speed issue either fixed or an answer!).