I've watched this movie long time ago, and more recently after watching Young Bruce Lee (2011). It was curious to find that this movie picks up right where Young Bruce Lee ends. Put both of them back to back, and you get a complete story of Bruce's rise to stardom.
While Young Bruce Lee was a recent production and style was of modern people and props made to look like '50s Hong Kong, this movie was made in the '70s, and all the fashion, and hairstyle are authentic '70s style. It was such a different world back then.
Bruce's greatness was he believed in himself when no one else believed that he could be a star. He had to battle his way up both as martial artist and a movie star. Without his pioneering effort, likes of Jackie Chan wouldn't have had the market to thrive in. All the kung fu movie stars of the world owes a lot to Bruce in this sense.
It's amazing that after almost 40 years since his death, his presence has not diminished.I guess that's the true quality of a star. In this sense, he's maybe topped the likes of Humphrey Bogart, Joan Crawford etc. in that they remain as old actors, but Bruce Lee continues to find new audiences.
It would be interesting to see how this segment of Bruce Lee's life would be remade into a movie using modern production.