The short version
Bang Mueang is a residential and industrial edge of Samut Prakan, with the BTS running through its northern urban corridor. It is a practical base for south eastern Bangkok rather than a destination neighbourhood. The quieter lanes can offer more space, but the main roads carry the daily movement.
What to expect
The area around Chang Erawan and the central Sukhumvit road is the most straightforward for rail and shopping. Farther east and south, factories, warehouses, canals and estates alter the feel. Check noise and the route to work at shift change, not only during a quiet viewing.
Getting around
The BTS Sukhumvit Line gives the district a useful spine. Motorbike taxis and buses serve the side roads, while cars are helpful for schools and industrial commutes. The line is a reason to shortlist Bang Mueang, not proof that every home is station convenient.
Verdict
Bang Mueang works if your life is already anchored in Samut Prakan. It is a weak fit for a resident who wants central Bangkok every evening. I would choose a home close to the rail corridor and spend the saved commute time on the compromises that matter, especially road noise and drainage.