Feng shui is efficacious when it is practised by a skilled and reputable practitioner.
Feng Shui has been part of Chinese Culture for more than 4000 years. Since the latter half of the 20th Century, it has spread to all parts of the world. It is being used by successful major corporations in the US, UK and other western countries, including those in the Far East.
If it were not effective, the Chinese would have ditched Feng Shui a long time ago.