I read with interest the thread "Sleeper Car or Flight, your Choice?" since on our upcoming trip, my friend and I will be traveling exclusively by train with 3 overnight train rides. We have 1st class Eurail Global passes and have booked all the overnight trips in 1st class double compartments. The first is Paris-Rome on the Artesia Night train, the second is Venice-Vienna on some type of night train, and the final one is Vienna-Frankfurt on the CityNightLine train in a deluxe double room with WC, shower, and breakfast. I didn't think the cost was too bad, but we're making up for it by staying in very cheap convents in Italy.
Anyway, my question is whether we can expect to get a good night's sleep in this type room? All the doors lock, but how "secure" is that? Is it safe to keep the luggage in a closet when we go to the dining car or bathroom or should we still cable lock it to something? I'm kinda concerned about trains after reading RS books about the "relative safety" of them. But mainly I would like to know if we'll get a good enough sleep to sightsee the next day without napping first. Thanks.