This is another one of those K-dramas that feels like a "must see" even if it is 20 years old (at time of review).

Parts of the story is "too crazy" - like how is it possible to sell her house without her knowing? And exactly HOW naive, gullible and shortsighted is it possible to be? And who in their right mind would stay in contact with friends like that?
Their constant bickering is also kind of over the top - I can't imagine many actually taking it for so long.
Main storyline is OK, except beforementioned weaknesses. It could probably have been stronger, but then it would probably feel even less original?

In the later episodes I thought the flashbacks at times were a bit too many/long.

Even so, I found it difficult to stop watching – although some of it on faster speed, LOL.

The acting of the two ML and the FL (Rain, KSS and SHK) were good. I was not as convinced by second FL (HDG).
Music was quite fitting.

By today's standard I probably wouldn't rate it as high as I have (7), but I am taking age into account. Rewatch value is a bit lower though. This is more of a "see once as kind of a classic", but not such a classic you see more times.