I've had mixed experiences and I do try to fly into International now.
At first I really liked Sanford - straight off the plane out to Dollar and on our way. However, the last time we flew back from Sandford, there were 3 flights leaving within the same 1 hour time slot so the queues to check in were HUGE - they actually snaked out of the building across the road in front of the airport. We queued for 2 hours to check in.
Things may be better now, or it may have just been out unlucky day.
Maxine