Started off good and interesting, but jumped the shark and became nonsensical by the end. Hard to take some of the cliches repeated ad nauseum over and over again, and the "logic" shown by some of the martial artists. I enjoyed it more than I didn't overall, but I felt like it dragged on too long and should've known when to end.
Kind of like those TV shows that would've been great if they stopped at 5 seasons, but drag on for 8 or more, and become a caricature of themselves, and a shell of what they used to be. Then again, the same could be said of the original Hokuto no Ken, and other "classics". They were good until they weren't, and should've ended before the author ran out of ideas and inspiration.