People love Exo... and I still just don't get it...
The track itself is catchy, and quite delightful over all. It's pretty well balanced and spatialized, and it moves well as the melody progresses. There's enough variance in the lyrics to keep it interesting and yet enough consistency to make it easy to sing along to; it really is a fairly well crafted pop piece. There's no deeper meaning or underlying current of power to keep it resonating after it ends. Other than the catchiness there's nothing in it to demand attention. If I wasn't paying attention and it came on shuffle, it wouldn't be enough to register distinctly, whereas others (even others made by Exo) make you look up for a moment at pay attention.
The styling is great, beautifully keyed in to both the settings and to the personalities presented by each member. 13 people is a lot to keep track of and despite the fans' ease with it, carefully delineating outfits are a welcome aid to casual observers. The choreography is less suited to... well anything. The movements are awkward and stilted, not because Exo is, but because the movements are too sharp to take shape and because they move outside the lyrics and too on-point to the rhythms (seriously, pausing for a beat so that a crotch-grab is an isolated on-beat occurrence seems just in bad taste). Sometimes movements that are unrelated to the rhythms or words works, but here it just feels awkward: just random whacking and hand-waving for the sake of being impressive rather than relevant. The gratuitous crotch-grabbing is just annoying, and the gratuitous hip-bump/crotch-rolls are worthy of an eye-roll. There are aspects of the choero that I do enjoy, when the members of the group are utilized as effects (I'm mostly thinking of the bit around 2:40 as the bridge rolls). Over all though, it's just there, impressive but not in a way that makes it instantly recognizable...
Still, the over all MV is pretty good. Catchy song, gorgeous guys, neat camera tricks; it's just not enough.