Binged this in about 3 days. Great friggin anime. Reminds me of Cowboy Bebop and Samurai Champloo combined. It simply has that 90's anime feel to it.
Total underdog story with awesome boxing scenes. I've never had a chance to watch Ashita no Joe which I hear was great. The fact that it aired about 50 years ago is a bit too old for my tastes at the moment.
The ending could have been executed a bit better in my opinion but it was still good enough to make it feel like a true end to a series.