Flew to KEF this week on WOW Air. Flights were on-time, on a very comfortable A320 each way. Loads both ways were very weak. ~70 each way, with about half that American voices. I notice that ORK-KEF is not bookable for the winter but DUB is already on sale. The in-flight magazine suggests ORK is year-round, so perhaps KEF won't be staying around, which is a shame.
Iceland itself was an stunningly beautiful visit, fantastically isolated and wild. In many ways not highly different to some of the west coast of Ireland. KEF is incredibly efficient and easy to navigate - despite on-line horror stories.