Well, I like it, and if the minors are OK, will probably buy it. It'll probably be very popular and may get some Potter fans into Tarot, which is not altogether a bad thing. I don't find it all that fluffy thus far-- it seems to have some substance to it. I like the magical school concept, and am amazed that Rowlings et al haven't come up with a tarot in all this time. I'd call this their loss. There certainly is a market for it, and "lightweight' decks like this can and do subsidize the 'serious' decks we respect.
It's been my experience that some of the fluffiest looking decks can and do give drop-dead accurate and blunt readings. So I'm not condemning it from what I've seen of it so far.