Got the first of the eagerly anticipated ViTrains class 47s in stock today, and whilst the 'finish' is better than expected, the first (and only) one I tested had a severe wobble.
I'm hoping this is just a one-off, but unfortuntaely I didn't have time to test any further examples to be be sure. However, I'd be inclined to ensure that you see any prospective purchase test run before buying.
John.