Don't get me wrong, it is a very amusing movie. I had fun watching it. But the trailer gives sort of a wrong impression being a new "Over the Top" (1987), while in reality this is an Over The Top cross The Karate Kid with The Powerpuff Girls crossover.
So basically we get the trucker and arm-wrestling kind of thing from "Over the Top" (1987), we add the cheating sensei and the sorry-feeling disciple from the "The Karate Kid" (1984) final match and we top it up with "The Powerpuff Girls"(1998)-sorta girl-power thing. The only thing we remove is the actual "Over the Top" parent drama, so in "Golden Arm" there is nothing serious, so generally it is all sugar and sweat with a pinch of glitter in the very end kind of thing.
Generally as I said the result is very amusing. Nice camera work, cool actors, not bad music, tough people and a cute main character which evolves quickly over time. And that's it.
Killing nearly two hours - sure, bring it on. It is amusing, I give it that.