I've probably listened/watched to this a few dozen times since I heard it when I started Hunter X Hunter (2011) In my opinion it's the best ending theme HXH has had so far.
Not too many people write reviews for these types of things since it's pretty hard to say what you think of the story when it's an animation for a song.
All I can say is I enjoy the song, the art/animation is really nice so I actually watch it instead of listening to it while browsing through another tab. It's cool seeing the different characters running around and it makes you think that there's something going on there.
In short, Japan's Smurfs are 10000% more badass than ours.