A Smyril Line passenger & car ferry called the Norröna sails from Hirtshals in northern Denmark via Torshavn in the Faeroe Islands to Seydisfjördur in Iceland, roughly once a week all year round.
Whilst flights are cheaper, I am tempted to take the ferry for a more interesting experience however, particularly in Europe, some ferries are functional and often not very pleasant (Bay of Biscay for example).
What kind of experience is the Smyril Line and is it any way superior (sustainability / cultural / enjoyability) to a flight to Iceland?