I've read through Adventure Booklet 1 and about a 1/4th of Booklet 2 and I'm really liking what I've read so far. Overall, it definitely has a dark, fairy tale vibe to the whole thing that I really enjoy, with its mixture of trolls and fey.
Personally, I do think it is different from the H-series adventures in two major respects (mind you, its still at the lower end of the paragon tier, so its not going to be super "paragony"
IMO). First, the immediate stakes are certainly higher than in the previous adventures, and second, it expands directly into the planar realms.