Id say if you enjoyed the TV show Vikings, you will definitely enjoy this. This movie has you feeling the power of the protagonist, as he hypes up the most dramatic revenge plot for his father and his bloodline. The acting of this entire movie was phenomenal.
The only reason why I give it 4 stars is because of its love story it develops. One of those love at first sight types. If he was not in love I feel it would have gotten more intense in regards to his hunt.
Overall though, great watch. The beginning is pretty off putting for some with the protagonist acting like wolves. So get through that and its smooth sailing.