Rageblade any good on tryndamere.

So I saw a video from boxer Pete who is the best tryndamere in North America where he built rageblade and 95% crit. Before s6, I used to build guinsoos every game and run it down top and while melting towers, open the gates just like udyr and get fed up the ass. Then I push bot and then mid. This isn't something I thought I would see. So didn't think rageblade was good if it is since he has no on hit. Sure he has fury but no other on hit. You attack faster to melt towers super fast. Is it good or just a fun item.