Before we get started, let me state that there will be plot points discussed in the following text, but I will do my best to keep crucial points a secret. Let me also state that I am not a professional critic, but have more critical film expertise than most people; having taken several film courses in college.

Rating: 8/10
Everyone knows the story of Sherlock Holmes, renowned detective. This movie is no different, with Holmes needing to solve a difficult case involving a sinister man named Professor Moriarty. The movie is deliciously mysterious, with Moriarty's motives in question until the final moments. Holmes of course enlists in the help of Dr. Watson, who is newly married; and the two go on an adventure that spans the European Continent to uncover Moriarty's plans and to try to save his intended victims that include Dr. Watson, his wife, a gypsy, and eventually all of Europe.
This movie was fantastic. Robert Downey Jr, Jude Law, and Jared Harris can do no wrong. The acting is superb, though sometimes over the top. I have, however, come to expect this of Downey Jr in general as well as within this franchise, so it works. He and Law make a fantastic pair, and the charisma and camaraderie come across well. Jared Harris makes a great villain as well, it's that simple.
The film lives up to its predecessor. It leaves a trail of clues that you are expected to notice, but not expected to piece together as Holmes does in the end. Certain important items are centered in the shot from Holmes' point of view, labeling them as imperative. The cinematography is sound, using multiple angles and distances when necessary. Sound is coupled with this approach as well. For example, there is one scene where one of Moriarty's lackeys is shown smoking a hand rolled cigarette. The cherry burns extra bright, and the sound of it burning can be heard over the other things going on in the frame. I wondered to myself, 'how is this important?' And I had a great time racking my brain trying to figure it out. I felt accomplished when it was revealed that the cigarette was important to the plot. This movie's greatest quality is that it makes you think and guess along with Holmes.
The film's comedy is fantastic, though sometimes ridiculous, as with the killing and revival of the poor bulldog (again). Though, once again, Downey Jr has made Holmes his own and put a modern spin on the man. That is not to say that the movie doesn't take certain liberties with the classics, because it does. Which is one of the reasons it remains an 8 out of 10 instead of a 9 or perfect score.
The great fighting scenes narrated strategically by Holmes return, though they go awry by variants not considered by Holmes. In the final scenes, Moriarty himself interjects in Holmes monologue and engages in a match of wits with the detective that is both exciting and original.
Speaking of which, editing must be mentioned. The film uses jump-cuts when necessary, and very effectively as well. Just before the scene mentioned prior, parallelism is used to near perfection as Holmes and Moriarty are having a game of chess. The movie cuts between chess moves and the exploits of Watson and the gypsy as they attempt to reveal an assassin and ultimately, Moriarty's plot.
My biggest problem with this movie was the extreme slow-motion. It was only in one scene, but that makes it stand out and it went on for far too long. Ever since
300, movies have been abusing slow motion. It was over the top in that title as well, but at least it was consistent. In an otherwise great, sound, smart movie I felt this was the only thing that seemed uninspired and frankly, too stereotypical Hollywood.
In closing, this move was very enjoyable. It was a bit on the long side, but I was sad it was over. In some ways, it is very typical action, in others, it is original, fun, and smart in a lot of ways modern movies are not. It is technically sound, but not ambitious. The cast delivers and I hope they continue to do so. The plot keeps you guessing right until the final moments, and there are many twists and turns to be had.
Go and see this movie while it's still in theaters.