Art, I'll copy a post I just made on your PIKO topic.
I got my feet wet in G gauge last fall with a used LGB Christmas set. My wife really loves it. We don't have much room as my O gauge layout is confined to an 11x11 room. Before acquiring the room from one of our now married daughters, I did put up shelves for a small ceiling level train to run in the 12x12 family room. I have had thoughts of converting that to G gauge.