Pleasant to watch and a fairly decent storyline but by no means the best of K-Drama. There wasn't really a whole bunch of chemistry; even as the series went on, it felt more like people playing a role than a story coming to life.
The first - oh, maybe 9 episodes were rather more entertaining because they involved ghost chasing and had some pretty funny scenes. After that, there was a pivot away from the show's early premise, toward much deeper, philosophical themes that, sadly, were only shallowly explored.
It could have been better - there was a lot to work with but, like trinkets haphazardly laid out on a bazaar table, there wasn't much to invest in.