On a modern train, you can count on extortionate Wi-Fi, power points and limp sandwiches.The TZ21 has builtin HSDPA so you can browse the net on your own terms, and you'll have all the power you need for watching DVDs. Sadly, no help with the sarnies. Time-saver or time-waster? A time saver. Now you can do all that last-minute shopping on Amazon.