A HUGE disappointment!
I am a REAL Sherlock Holmes fan with DVD's of nearly all that various actors who have played this part, new and older.  I had been looking forward to the performance of Ian McKellen, one of my favorite actors, in this role.  Sadly, it was very disappointing.  He is good.  The script is dull.  The directing is poor.  It's a very wooden performance, a movie without enthusiasm.  Except for feeling sorry for Sherlock, there isn't much more to be said.  An old Sherlock Holmes would present some fascinating possibilities that were simply NOT done in this movie.  Maybe somebody will take that up down the road.