Walter,
I've assembled the single cylinder version - the VR1A. It also has the Stephenson reversing linkage.
The kit was delivered promptly, was very well machined and went together without any difficulty.
I've only operated it on compressed air, so can't speak to its performance with steam. Also, it is quite a small model (just a little over 3-1/2" high) so not sure what sort of power it would produce, although the twin would obviously be much more capable.
Here are a couple of videos - same model, just better lighting and fancier production for the second video!
http://youtube.com/watch?v=C9y0UMnskKshttp://youtube.com/watch?v=8LtbtAW9ZaMCheers,
Floyd