It seems somewhere in the boon time of the mid and late 70s, a terrible formula developed where the creative team would come up with one or two clever hooks for a movie (in this case telling the story through flashbacks and an Achilles' heel up the star's ass), then build a by-the-numbers film aorund it. We've all seen them--huge fights where most of the extras just stand there, weak choreography, nonsensical plot developments (hey, here are a bunch of poles, let's fight on top of them!).

Unless [you're a completist], don't waste your money.

So: good fights, great acrobatics, not a must-see but well worth it.