I'm about 2/3 of the way through with the first fair isle mitten...it seems to be going OK. I'm still not sure about this fair isle thing, but I like having a somewhat difficult project to work on for half an hour or an hour or so every day. I think I like cables better though.
It is starting to be a bit magical, though, how each row adds another dimension of depth to the pattern. LEt's hope for a very cold winter!