This was a great, great movie. It was an excellent ode to Hugh Jackman playing Wolverine for 17 years. However - it was absolutely NOT an X-Men movie. I can totally understand people going into this with those kinds of expectations being massively disappointed with this movie. There were virtually no sci-fi special effects. The action was very straight forward and they loved having the R rating and not having to hold back. There was no futuristic cinematography. Everything was very barren backgrounds and what not. This movie was basically a legit movie about getting older and coming to terms with it but starring Wolverine. There really is no other way to describe it. In terms of acting and actual screenwriting - this is the best of the X-Men movies.
If you are able to see it for that, you will be able to really appreciate this movie. If you are looking for a heavy special effects popcorn movie that X-Men has become known for - you will be heavily disappointed.