I'm normally not a fan of reality shows because of the fighting, scheming, etc. Honestly, I have no idea what made me turn this on, especially since it's two years old, and I don't follow Enhypen. I did find quite a bit to enjoy about this show, however.

Namkoong Min as the announcer - He fascinates me as an actor, and he has the perfect voice and visuals to be the announcer of this type of show.
Rain as a mentor in part 1 - charisma, that's all I can say.
I-Land vs. ground - great concept, stay in the top of the rankings and you stay in I-Land with all its associated perks: practice rooms, kitchen, cool bedrooms, etc.
The bonding between the young men. Sure, they wanted to debut, but they cared about the others that they were with. I can't even begin to imagine the stress that they were under, and that was released through tears, A LOT. Someone was always crying, it seemed. Personally, I cried more than once.
The dancing. The focus was definitely on their dancing ability. I loved watching them learn the choreography and their performances. I'm a little confused how they could almost completely ignore vocal ability - background music and singing was always cranked up so you could hardly hear them singing.

My complaint with this show was the voting. When all was said and done, I believe it was rigged. There was one person that was VERY strong throughout, at the top of every test, had the perfect visuals, was a natural leader, spent time helping those with less skill, got along with everyone, received consistent positive feedback from the coaches/judges, and then was eliminated. Were they trying to create a surprise at the end? I don't know, but it made me angry.