This is a combination of traditional Victorian ghost stories, folk tales about "the good people" (fairy tales) of Ireland, and legends concerning ne'er-do-wells, who have sold their souls to the devil. As a preference, I enjoyed the traditional Victorian tales best, but there is some really excellent writing in this collection of stories.
I particularly enjoyed the first two stories: the title story and "Squire Toby's Will", but my favourite, I think, had to be "An Account of Some Strange Disturbances of Aungier Street" just because it was such a wonderful mysterious tale of a haunted house.
There is some real craftsmanship in the writing here although I tend to agree with the introduction by M. R. James (who wrote the introduction in my edition of the book) in that he argues that the later stories (the earlier ones in the book) are the most polished in the collection; just because by that stage Le Fanu had perfected his art. There are some beautiful examples of writing and Le Fanu has a marvellous turn of phrase, particularly as he compares the oral art of story telling to that of the written word. I loved the line: "Pen, ink and paper are cold vehicles for the marvellous, and a 'reader' decidedly a more critical animal than a 'listener.' (p. 68). I found some of the Irish pronunciations a little hard to follow, but this is a lovely collection of stories - well worth a look.