Product review (3 stars): Reduces the white mineral dust on my black Crane Train
I purchased this for the Crane Train because I was tired of cleaning the white mineral powder off the train's black surface.  Much like the train, this came with little documentation, so I was left to play with it in trying to get it to fit.  I was about to agree with others in that it didn't fit the train when it finally found a place it liked.  The top doesn't fit as snugly into the base with this filter, but the humidifier still does work ok.  - 1 star there.  I notice that I still have some mineral dust, although not as bad as it was before this filter.  -1 star again.
I do love the humidifier itself--I think it touches the child in everyone who sees it!