Stefan Birgir Stefans’s review published on Letterboxd:
As an Icelandic person, I must point out that you don't have to travel by horse over mountains to get to any villages here (also, Batman, a horse? you're Batman not Lucky Luke, use a batsnowplower or something). No villages are managed in pubs nor rely on superhuman aqua based superheroes for food and at no point will Icelandic people start to sing "Vísur Vatnsenda-Rósu" in unison at you like they do here.
The Icelandic they spoke was correct, though.
Also, this movie did not need to be 4 hours.