Well, thought i should give my review on the two i purchased if anyone is interested.
Both models are absolutly mint. No signs of excessive grease or the like. On running, both models run very smoothly, initially they were a little hesitant however, after a bit of running in they soon became much quieter and became more responsive. Im running both models on DC so not sure if the issue people are having are related to the fact they are dcc and its causing electrical issues.
Having watched this thread carefully, i am a little concerned that both locos could fail as quick as they have ran. Not good for Bachmann, we have been so used to high quality mechanisms its disappointing they have went to a system that is not as reliable as the trusted tested type we have got used to.