T'was an okay read, although in my opinion not as strong as some of the other books. The Witches in general, I feel, serve as poor main characters (at least in the two I've read so far). Reading books revolving around them feels more like a chore to get to the next book involving someone else than anything else.
That said, there are many good bits, like in any Pratchett novel. The Shakespeare jokes are appreciated, both the obvious and subtle. Tomjon is likable, as is his fathers' ghost, but I feel that the Witches themselves are more annoying than anything else.