After Wit Studio's incredible job with Attack on titan, they are back  this time to tackle a manga that is often compared with the likes of  Vagabond and Berserk and was once thought unadaptable.
Are you interested in Vikings and Norse mythology? Do you want stunning  animated action scenes? Good world-building? Great character  development? If so, then wait no more as you are bound to enjoy this  series.
The very first scene of the series sets you in the mood and gets you  immersed in the story–from the stunning visuals, gorgeous artwork to the  ruthless, merciless and outstanding action-packed scenes and  astonishing directing. The plot is based                    on real historical events and so far, it does a fantastic job  narrating it, with careful world-building and character development. The  series depicts  Vikings very well: they pillage villages for goods and  are not hesitant to kill anyone who tries to stop them from doing so, no  matter who they are; even children or older persons.
Not only Wit studio is doing justice for the manga, but they also did  anime original episodes, to develop the main protagonist's Thorfinn's  character furthermore. So far Thorfinn is a very interesting character.  At first, he is just a normal and innocent little boy but after a  certain event, we can see how and why he is continually becoming more  revenge-driven and violent. On the other hand, we have Askeladd who is a  perfect representation of a leader. He is very tactical and even when  he seems defeated he can pull out a last trick up his sleeve, even if it  is dirty to come out victorious. He garners respect from his men and  was undefeated in battle.
Concerning the animation, it is engrossing and goes perfectly well with  the medieval setting of the series. Moreover, some of the background  arts are astounding. Yes, there might be CGI here and there but Wit  studio usually utilize it very well and it is not as bad as in some  other anime.
Apart from that screaming part at the end of the opening which was kind  of edgy, both the latter and the ending is great visually and musically  and they fit perfectly well with the series.
Wit Studio is doing an incredible job with the series so far and you can  easily tell that they care about the source material. If they keep it  up and stay faithful to the adaptation while also adding things to  refine the anime from the manga, then this might just be one of the  greatest adaptation ever. 
Conclusion: No moe bullcrap, stunning artwork, consistent and solid  animation, characters you feel strong about. This is exactly how an  anime should be produced.
