It's all ok when the real people remember to make an announcement about a train, but not so good if they don't as people have to guess which train it is!
I was catching a train from Maidenhead to West Drayton last week when the screens were out and trains weren't running on time. There was an announcement, but it was totally drowned out by a train pulling away from the opposite platform. I decided to take a gamble and got on the train - it stopped at Taplow, Burnham and Slough, so I assumed it would stop at West Drayton as well. Unfortunately it didn't so I ended up in Hayes where the screens informed me that the 16:17 to Banbury was on time - great, but this was about 18:30. When a train eventually arrived (after 25 minutes or so) there was no announcement to say what train it was or where it was going - luckily it did stop at West Drayton, but I could have quite easily ended up in Slough again...