Just been away for the weekend, and to get to destination and back had to get four different trains. On each journey the whole pre-booked tickets/seats thing was a debacle.
On the first 3 trains people had obviously moved some of the tickets that they put in the back of the headrests. No problem for me, as am happy to sit wherever, but it was like bloody musical chairs. People walking up and down the carriages trying to find their seats (whilst whacking seated passengers round the heads with big rucksacks etc), asking others to move, thinking they were in the right seats and then having to move again, getting wound up with people in the wrong seats, demanding their prebooked seat even though there were perfectly good ones nearby etc etc.
The final train I was on was packed and had those 'fancy' electronic messages above the seats saying the journey they were reserved for. In the space of a three hour journey in the so-called quiet carriage, approximately 20 people had to move cos they were in the wrong seats, there was one big altercation, one elderly lady got upset cos she had no idea where her seat was, and one couple who had missed their previous train so had no pre-booked seats, had to move seats approx 8 - 10 times during the three hours.
All in all the train journey was far from relaxing and certainly not quiet. I will be driving next time!