There were still a few parts where my reaction was: "Really? [Insert Trope Here]?" But it was still enjoyable, still a bit twee, still wonderfully written.
Once I got past those darn tropes, I was much more interested in Elsie and Rachel's story vs Curtis and Prue's, which felt very familiar. Also, the moles were awesome, though maybe underdeveloped.
And the ending was too much cliffhanger--Part 1/Part 2 style--to be satisfying.