It had an interior like this one (not my photo) https://flic.kr/p/HoNo9BThis looks quite nice- I think it looks smart. Do you know if this unit previously had Chapman seats, or 2+2 Ashbourne style seats?
If Ashbourne style, then that could be a shame, as they were really comfy (imo). If Chapman, then this is likely an upgrade (I really don't like chapman seats on 158).
However, I will reserve my judgement until I get to travel on a unit with this setup.