The short version
Bang Phli is a large south eastern district tied to the airport, factories, logistics and new residential development. It is useful for people working in that economy and for families choosing space over centrality. It is not a walkable alternative to inner Bangkok.
The lived geography
The roads around Bang Na Trat and the airport side are broad and commercial. Smaller communities and canals survive between industrial estates and housing projects. Retail is concentrated in large destinations, so a car, motorbike or app taxi is more useful than a plan based on strolling to shops.
Getting around
The Yellow Line offers a connection at the northern edge, but much of Bang Phli remains dependent on road transport. Airport access can be convenient from the right side and slow from the wrong one. Check tolls, shift traffic and school routes before choosing a home.
Verdict
Bang Phli makes sense when employment, school and home all point south east. It can be comfortable and spacious, but the district does not hide its logistics landscape. I would choose it for a settled routine, not as a speculative “near Bangkok” address.