I've never been to Switzerland before, but in other European countries I have been separated from my luggage with the luggage shelves on the ends of the train cars (near the doors). I've never locked up my luggage before, and I've always been lucky, but I'm wondering if I should bring a thin chain/wire lock to put through the handles and chain the luggage to the luggage shelves. It seems like overkill, especially as we will keep our valuables with us at the seat and just have clothes, etc. in the bags. What are your thoughts? I have a chain I could use, and it is not terribly heavy, and it would be a pain to lose all our luggage. I wouldn't leave my luggage at the end of a compartment, unlocked, on a train in New York. Is it worth bringing the chain? Or is the likelihood of that type of theft on a Swiss train so slim that it is really not a major concern? Or do the Swiss trains have luggage compartments directly over the seats? Thanks for your help!