We went to see it last weekend and I enjoyed it very much. I think it may have been a bit too gentle for my fiancé who was expecting a lot more sleuthing!
It was a simple story, much of it told in flashback so we see some of the middle aged, more energetic Holmes. Ian McKellan's portrayal of old age and memory loss was very touching. It was a period piece, beautifully filmed with shots of the countryside, a devastated post-war Japan, and the London of Holmes's earlier life. The supporting cast were very good, especially the little boy Holmes befriends.
Definitely worth seeing in my opinion.