Decent. Now the final product well be placing decoration inside the train to make it stand out and have that train feel implemented to it is this already being planned out?
If you want to place random items include holding poles and decorate the seating a bit more to have that subway feel I’m assuming this is still a work in progress. If your planning building the exterior of the building there’s amount of things you could include such as advertising signs adding some props or nails on the important objects to look more detailed.
After all, there’s different approaches you could take take: Otherwise it’s a good build I’d be interested to see the final product.