Being a Bruce Lee fan, this was a joy to watch.
There were a few forgivable embellishments: Like Bruce lee being way too nice of a guy, strutting around like the heartthrob of Hong Kong, running amok with his stand by me rat pack, and a few doses heavy handed doses of melodrama(to appease the eastern viewer), and yes they did hire a pretty boy for the lead role.
The cinematography is stunning and the historical setting and context really paint an accurate portrayal; as if the director himself had lived through those times. Right down to playing marbles in the street, a cherry blossom tree inside the household, or the grander themes of the Japanese and British occupations. Its also very cultural at its roots, if you're not familiar with Traditional Chinese culture, some things may not make sense.
Just don't expect an action flick (although there are a few fight scenes), rather view it as a well drawn bio drama/ period piece, and you'll walk away with an enjoyable film.
