Yeah, it falls into some silly tropes and, let's call it, faux drama/tension, but at the same time knows when to stop before you start gritting your teeth and rolling your eyes at it all. Not only that, I think it handles it perfectly, as if to oppose the standard drama formula.
The romance is beautifully crafted and made me squeal shamelessly into my pillow.
I'm particularly impressed with the character Kim Moon Ho, his personality and complexity.

[Non direct spoilers but read at your own risk]

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I'm so relieved to say there's no love triangle. Just this deserves a high score on its own.
The ending felt a bit weird and went into directions I didn't really enjoy, but at least it had a proper ending.
A few characters didn't get enough of a resolution in my opinion. In particular Kim Moon Shik as I really enjoyed watching him and all his layers and wish there was a little bit more time for him, especially towards the end.