I'd like to go, except the cancellation rate for the M/V Fling I've heard of (due to weather/sea conditions; in fairness, I don't want them doing out when it's unsafe, so this is not a criticism of their decisions) sounded pretty high (varies by season), and I live far enough away that I'd want to fly down, and do 2 trips (they tend to be short) back-to-back to justify the expense.
If I were fairly close driving distance, it would be a much more attractive offering, since I could book, then if I got a call the day before that they cancelled, I could reschedule without having to deal with flights.
If you go, write us a trip report. I don't see many about the M/V Fling, but every one I see is good.
Richard.