Even though the episodes are only 11 min long, the overall quality of this drama makes it appear more like a full-length drama (but without the draggy bits).

While the plot is classic false-identity/revenge fare, this drama has many strong points that I would wish to see in normal length dramas:

Despite some twists, the plot remains coherent until the end.
There is a strong female lead and all the female roles manage to avoid the usual, dreadful stereotypes of damsel in distress, moronic maid, obsessive delusional cousin/sister/love rival, etc.
It isn’t a big production, so the cast is quite limited, but it doesn’t feel like more people were needed. The acting by the main cast is pretty decent and the martial arts sequences look well choreographed.
There are plenty of romantic scenes between the main couple, but thankfully without any of the usual cheesy tropes like viewing lanterns/fireflies, falling blossoms or slow-motion/repeat scenes. Their chemistry is sufficient to not need any of this to show their feelings.
The drama did not lose its momentum in the second half and the ending felt sufficiently fleshed-out.

If I had to point out one thing that I disliked about this drama it would be the ending OST which I found quite unbearable. Every time that squeaky voice hit the high notes is felt like fingernails scratching on glass.