I have not missed a commute yet. Yet being the key word. I'm on reserve so there are times when I have to non-rev up because all of the jumpseats are taken. I have missed my first flight due to loads being full. When this happens it is very nerve racking waiting to see if I'll get on the second flight. I've always been successful so far. If I call in and get positive space it seems to count as my one try even if the flight got every paying passenger on. This policy is better than what we had, but I'm afraid to use it. I had no problems using the Northwest policy as it was no questions asked.