I really enjoyed it - it was a bit silly, but in a good way, and great fun. Lord Blackwood looked rather like a Nazi from an old war film, which was a tad disconcerting.
I liked Mary - she was a sensible person, didn't take any of Holmes's shit, and I hope she's in the sequel (I'll be very surprised if there isn't a sequel).
I loved the couple of nods to House - Holmes writing all his thoughts on the wall, like a whiteboard, and the bit where Holmes told Watson he was already "missing the thrill" and "Admit it! Admit it!"
Definitely one I'll be getting on DVD.
Also, HAPPY NEW YEAR to everyone.
(I'll be glad when it's tomorrow morning - I don't like New Year celebrations :D )