It wallowed..I mean it really wallowed no manner of action scenes and CGI explosions could really compensate for the lack of pace. There was absolutely no tension even as the whole of parliament is about to be gassed. The fact that some one thought that adding mission impossible style action sequences in essentially a period drama baffles me. Bad scripting or bad editing I just can't say potentially even bad directing. The acting was good Downey made the best of a paper thin character (why exactly does London's top crime detector insist on bare knuckle boxing?) and Jude Law equally did as much as he could with this dire lolloping story.
By the end of it I just didn't care..... it is open for sequel with the mysterious moriarty still bent on mischief but to my mind, Holmes better investigate the Crime against Conan Doyle's work before a sequel.