I'll start by saying that i'm not keen on movies in general (wether Korean or Western) and that kdramas are mostly the only cinematographic pieces I watch, but, I indulged in this because I like DO, and because Jo Jung Suk (whom I didn't know before this) seemed a pretty fun actor from the promo interview. I watched the movie without subs. There you have it, and nope, I don't speak korean (yet) Before you think my review is invalid because I couldn't grasp everything perfectly, let me stop you because this is the exact reason I'm writing this review: even with my extremely limited understanding of the language, the story, the actions, the whole thing seemed crystal-clear to me. I never felt like I was watching a foreign-language movie. Everything made sense and seemed logic, because the acting is top-notch. Top. Notch. When the brothers were having a quarrel, I understood it. When they were laughing with each other, my heart melted. When they were teasing each other, I chuckled. When they were talking over sad stuff, I teared up a bit. And I cried like a baby at the end. Their facial expressions are mostly flawless and very accurate. I mean if one tells X in X country their puppy died they'd have the same reaction as Y in Y country, we all constitute humankind. Their tones also help to get the feel of the situation, even if they're basically talking gibberish to you, their tone makes sense. Now if you know even like 30 really basic words like mom, eat etc. it's gonna help a LOT. And you probably do know these words and way more than 30 if you've been swept by the Hallyu long ago so you have no excuse not to watch this movie :-) I thought I'd have to watch this a second time to understand it fully but I really don't, and actually had to write down in my notes that I watched this movie in Korean because there's zero gray area really. I understood about 10% of the lines (literally, as in I know what they're saying right now bc I know exactly all the words), but my actual understand of the plot and what was happening was around 90%, maybe even 95% because as I said before, the few words you know, the scenes and mostly the perfect faces and the tone, of the actors makes you totally forget you're watching it without subs. I gave this an 8. It wasn't actually that incredible of a movie, it was rather two well-spent hours and a good laugh, but 7.5 just didn't seem good enough, that's why I settled with the upper mark. In a nutshell: a good watch !