Really, really good up until last 10 minutes.
Each episode is great, even the third one which features one of the scariest parts. It was a lot different from the first two episodes, and I can see why a lot of people hate it, but I found it equally entertaining, although I didn't like the ending, and the whole atmosphere and Gothic vibe is lost. Maybe it would work even better as a long movie, with third act changed and shortened? Nonetheless, I think the whole miniseries is a bit underrated.
Episode 1 - Great, sometimes awkward, but really fun!
Episode 2 - Great too, with "The Terror: season 1" vibe!
Episode 3 - Nice change, not as great as the first two, some notable scenes and bad ending!