It runs very smoothly, DCC only of course, whoever set up the CV's did an excellent job. The wheels are well aligned too, nowhere near as much oscillation/rocking side to side as a Hornby Castle etc. I couldn't be happier with it.
jonhall, as best as I can measure it's 274 to 275mm long on the straight section of track, tender coupling "at rest" for straight ahead, from buffer head to buffer head. The tender coupling has slots that look like seagulls wings, just like a Keen Systems close coupler, which to me looks like it will lengthen the drawbar by upto 4mm on a tight curve, 2mm movement each on the tender and loco.
Dave