To start us off
Class 158 -
Traveled on 158832 Arriva Trains unit, between Wrexham and Rhyl today. A nice interior and a nice acceleration rate once we got out of Chester. The only gripe I've got is the dam electric toilet doors, the thing wouldn't shut. Luckily between Wrexham and Chester we where running i multiple so a quick walk up the train to the other toilet. Also the interior lighting was a bit dim.
Class 175 -
Traveled on 175105, a three car Arriva unit in a rebranded livery. A really nice spacious interior with decent lighting, and the toilet door is hand operated so no problems there. Not that many table seats though, considering there supposed to be for long distance journeys.
So there we go add your opinions here.

