My views through my journeys in them:
13005- Moderate cleanliness, good punctuality in summers, average food, Just OK for railfanning.
13009- Moderate cleanliness, good punctuality in summers, No pantry car but vendors take order (do not take from them), Good for railfanning better than 13005.
13019- Takes circuitous route, hence never traveled.
12331-...
more... OK cleanliness, don' t trust for its punctuality even in summers, good food, Good for railfanning.