Like it thus far.
Don't mind that they merged the Lodbrok saga with the first chronicled Viking raids, but that few believe in a 'land to the West' is far fetched considering the mass emigration of Angles, Jutes and other Western Scandinavians to the British Isles for millennia prior to the series' start. May be an expression of the commonplace misunderstanding that water divided instead of connected people and nations in earlier ages. If not memorized in runes at least the strong tradition for tribal history songs would have remembered, either by shamans, priests or skalds, but more likely there was already long established trade routes between Eastern English, Scottish and Irish provinces and west coast Denmark and Norway.
It probably also plays on Vikings as explorers (Greenland, Iceland, Newfoundland, North America etc.) and the whole discovery, 'Go West', Columbus myth, particularly popular with an American audience.
Really hope the series will include Ragnar's siege of Paris in 845AD (
http://www.fordham.edu/halsall/source/843bertin.asp), and not be too Anglo-centric (considering much of the Danish foreign policy at the time of Ragnar Lodbrok was directed at the Frankish Empire on mainland Europe).
