Just saw this this evening 
If you liked the first one then GO AND SEE THIS, it was brilliant (if you didn't then avoid like the plague) Lots of wonderful Holmes/Watson snarking and explosions and general ridiculousness and I want to see it again right now. It's one of those films where it just feels like the actors had a great time making it, and there's some damn good actors in it too. Stephan Fry actually pips Mark Gatiss as Mycroft as much as I love the BBC Sherlock. Film version and BBC version are such different beasts that you can love them both at the same time but for completely different reasons.