The story, combat, and characters are all great, but the final boss might just be the worst in the whole series.

Its the video game equivalent of if an acrobat tried to do a flip, jumped into space, shattered an extinction causing meteor, reached the moon, killed an evil moon dragon, fell back to earth while doing 700 flips per second, only to deliberately snap their own neck just before landing.

Its that bad of a final boss.
But its worth playing! Especially so that you can get to 5, which is frankly much better.