For obvious reasons the show requires a huge suspension of disbelief before watching it. If you keep that in mind, the show is just incredible.
The story keeps you on your toes, as the characters are slowly unveiling the story behind Med's death. The actors are phenomenal.
It's in it's core heartbreaking, but so charming and heartwarming at the same time.
For a story about a ghost being trapped between life and afterlife, it's very cohesive and there aren't any discrepancies in the lore as far as I'm aware.
Definitely worth watching.