The short version
Lumphini is a small, expensive central pocket organised around the park, embassy quarter and the office towers of Wireless Road and Rama IV. It is best for someone who will use the park and values a short journey to Silom, Chidlom or Sukhumvit. It is not a conventional local neighbourhood, though quiet lanes survive behind the major roads.
Park side and office side
The park is the address’s great practical asset, not merely a view. Ruamrudee and the lanes near Wireless Road have a different rhythm from Rama IV, where traffic and construction can dominate. The park edge can feel wonderfully open in a city of hard surfaces, but the roads around it are busy and crossing them is not always pleasant.
Getting around
MRT Lumphini serves the southern edge, while Silom and Sala Daeng give access from the west. BTS Chit Lom and Ploenchit are useful from the north, depending on the exact home. A car is unnecessary for most professional routines and inconvenient at peak hours.
Verdict
Lumphini is worth choosing for the park and centrality, not because every street is peaceful. I would pay attention to bedroom orientation, construction outlook and the walk to rail. For a runner, dog owner or office worker, it can be unusually easy. For anyone wanting a lively local street, it may feel too corporate.