Lewisc--twice the flights were changed well in advance of our trip (about 30 days) and once the change occurred when we were about 3 days out--they dropped a flight and were changing their schedule around according to the CS person we spoke with. Actually the 4th trip was delayed because of weather but I don't count that since it could happen/does happen with any airline.
I thought it was interesting about the changes because we had heard they always stick to their posted schedules. We wanted specific times because they corresponded with our work and our DS' school schedules and we ended up not leaving at the times we wanted.
However, we fly pretty often (I've logged about 20 flights this year, DH over 50 and DS about 20) so we don't get too upset over things like this. I just didn't like the way they handled the changes that were 3 days out. Anyway-noy knocking them but they certainly did change our flights--perhaps it is out of the ordinary--but it happened nonetheless.