Well I wouldn't agree with your first part of that sentence, a round trip to Glasgow on the WHL yesterday involved a southbound journey on a well beyond worn out shabby interior, the fold down table at my seat couldn't hold a coffee because it was so far below horizontal. But the 156 I came back on was simply embarrassing, no other word for it, by far and away the worst rail vehicle I've travelled on in my life. It's not that a recent shortage of units has caused it to go a bit longer than desirable between an internal refresh, it was simply a disgrace that has taken many many years beyond when it should have been refitted to get to the state it was in.
Was it an old SPT unit, it had the remains of green fabric on the walls and green fake wood effect tables. Difficult to tell if the material was worn through the base or 3 decades of filth rammed into it. The carpet probably can't be replaced as it's now a SSSI. The reserved seat I was allocated, couldn't be sat on for more than a minute or two it was that wrecked. The toilet had battered panels with big screws driven through badly to hold it in place. Ironically given the state of it that unit did have WiFi!
The lack of toilets compared to the 158s is a major issue on the WHL 156s, and the fact they open into the carriage because they lack the closed of vestibules of the 158s. So while there is some hate for the ScotRail 158s on here be thankful for small mercies! There are infinitely better than some of the alternatives. I'm very glad those visiting the North of Scotland on the Far North and Kyle lines at least have the 158s to travel on, because I was simply embarrassed for my country seeing tourists traveling on that sh!tehole last night.