First off, it was a lot better than I thought and definitely superior to Origins. Pretty good story, and they did a decent job Logan's loss of his invincibility and how he dealt with it for that time in the film. Once Silver Samurai started fighting, I kind of thought it was big enough to house a person and Viper's intentions, and the way she talked about fulfilling Yashida's dying wish make it somewhat obvious the old man was inside plotting away.
On an unrelated sidenote, Svetlana Khodchenkova is really hot:
Overall, a good movie and a nice credits scene with Magneto and Xavier foreshadowing DoFP. Really looking forward to that next year.