I am getting annoyed at the constant adds Jetstar have about double the price difference if you can find a cheaper fare on another airline at a comparable time. No amount of time is indicated in the add as to what a comparable time is. I found what I thought was one, Virginblue at 8.20 am Syd - Mcy 25th Nov @ $65 and Jetstar 9.30 am @ $149. However the comparable time has to be maximum an hour and this was 1 hour 10 minutes, which I considered a comparable time. They wouldn't accept that, so ofcourse I booked Virgin. As Qantas club member I like to fly Jetstar so I can use the club, but not at that price difference. I don't think this guarantee is worth much if they have that tight a frame on it.